The evidence from evolution seems overwhelming that women have evolved a diversity of sexual strategies, all with the aim of getting the 'best' sperm based upon her position within the tribe.
Males and females do not represent two discrete populations, heterosexual and homosexual. The world is not to be divided into sheep and goats. Not all things are black nor all things white. It is a fundamental of taxonomy that nature rarely deals with discrete categories. Only the human mind invents categories and tries to force facts into separated pigeon-holes. The living world is a continuum in each and every one of its aspects. The sooner we learn this concerning human sexual behavior the sooner we shall reach a sound understanding of the realities of sex. (Alfred Kinsey, Sexual Behaviour in the Human Male, 1948)
While this may be a monogamous coupled relationship, as the research below shows, it is clear that there are many other strategies available to a woman as well.
* The shape of the penis causes it to act as sperm pump. The only explanation is to displace other male's sperm - thus it must have been common for the female to have sperm within her vagina from a variety of males.
* It is clear from evolution that the more promiscuous the female of the species is, the more 'sperm competition' strategies will evolve in the males (we have a great book on this, 'Dr Tatiana's Sex Advice to all Creation', by Olivia Judson).
Some species form such sticky / waxy semen that it becomes a plug that prevents other males fertilising the female. In human males there is also some Semen coagulation, and natural spermicide properties (to kill other male's sperm) which suggest the female was promiscuous.
Evolution, Human Reproduction & Fertilization: Semen Displacement as Sperm Competition Strategy
* Related to this, seminal fluid buffers acidity of vagina, creating more viable conditions for sperm.
Evolution and Group Sex: Successful Sex Strategy to be Last in Line
* There are benefits of multiple sex partners for sharing of diseases (and hormone function)
* By having multiple male partners the woman can confuse paternity (thus there is less chance of infanticide, males provide more help & food for raising young).
Sexual Evolution: Recent research challenges notion of Female Monogamy
* Women can have multiple orgasms (unlike men). This suggests that females evolved to have sex with a series of males in succession (which may partly explain the 'gang bang' fantasy of males).
Female Masturbation: A Variety of Techniques, Sexual Response & Multiple Orgasms
* Related to the above, children evolved to look more like their mothers (to confuse paternity). The male infanticide instinct is obviously more hostile to other male's children.
* The evolution of pornography. Males have evolved to watch other males having sex with woman, which aroused them in preparation for their turn.
* Similar to above, there is some instinct in males to masturbate in groups (waiting for turn with female).
* The woman's vagina is lubricated only at the beginning of sex. We suspect this is because seminal fluid also acts as a lubricant.
* Other primates are promiscuous. e.g. Bonobo (we need more research on this).
All in all the evidence is conclusive. Females have evolved to be promiscuous as one common strategy in their ancestry. And this diversity of behaviour is also shared by the males, creating a wonderfully rich and complex tapestry of sexual behaviours and strategies.
Sexual Evolution: Recent research challenges notion of Female Monogamy
For generations, biologists had assumed females to be naturally chaste, while males were renowned for their promiscuity. Now, hundreds of studies and a spate of books are challenging that conventional wisdom. Females of many species have evolved strategies for passing on their genes that involve copulating with multiple males - and recognition of that fact is literally changing our view of the birds and the bees.
'Natural selection, it seems, often smiles on strumpets,' says evolutionary biologist Olivia Judson, 'As a rule, loose females have more and healthier children.' ... On the surface, the conventional view made sense. Sperm seemed to come cheap to males, while eggs were expensive to females, which have to invest the time to raise offspring. ... Then came DNA paternity testing. The first and most extensive examples of polyandry were found among avian species, which was quite a shock to scientists because birds had appeared to be paragons of traditional family values.
Biologists have struggled to come up with broad theories for why females benefit from playing the field, but so far the reasons seem to vary widely according to species. A lot of complex theory boils down to this: A gal's got to do what's necessary to ensure the survival of her genes. In some cases, females may get more help around the home. In other cases, females swap sex for food - the more sex, the more food and the healthier their offspring. Promiscuity can also simply be a matter of survival. Male chimpanzees, for example, have been known to kill infants not their own. Frequent sex with several males can confuse paternity and act as insurance against harm to her offspring.
Females of many species have sex with multiple partners. Males, in turn, have adapted ways to ensure that their genes, and not those of competitors, are passed on. Understanding this co-evolution is changing our view of male and female sex roles.
This story actually started a year ago when my girlfriends , most of who are bi as I am threw me a birthday party . One of the "joke" gifts was one of those inflatable dolls that caused a lot of laughs as it was intended . After the party I put it up on a shelf in my closet and forgot about it .
Fast forward to a month go . My three closest girlfriends all went on vacation to Jamaica but I had to back out as sudden job requirements woudn't allow the time off . So , I was sitting home alone one evening thinking of all the sex they were likely engaging in either with each other or some of the newbies they had hoped to meet there . This was making me extremely horny and after masturbating and finding myself still needing more my mind went to the blow up doll . At first I dismissed the thought as I am a healthy , attractive 28 y.o. old woman with normal sexual desires but the thought kept returning . I figured , what the hell .
I took the doll out of the box , laid it on the bed and inflated it with the pump that came with it . It looked really stupid with a clownish face and straight out arms and legs but lo and behold right in the center of it's body was this magnificent 8" cock as big around as my wrist ! It even had veins like a real one and a just right sized head at the top . Two latex balls sat under it . I felt it and it was cool to the touch so I got some hot water and soap to clean it and this warmed it up . I amazed myself in that I was actually getting wet as I stroked it . I was able to envision it as a real cock and I knew I had to go further . I placed my mouth over the head of this monster . It did have a slight rubbery taste and smell but by now none of that mattered as I was getting hot . I closed my eyes and slid my mouth down the length of it's shaft and it was easy to pretend it was one of my boyfriends cocks that I was going down on . When it hit the back of my throat I slid back up sucking hard on it as I do with a real cock and then runing my tongue around it's knob . I got into a regular rhythm sliding down the shaft and sucking back up . I honestly felt like I was giving someone a blowjob and this thought caused my nipples to get rock hard and what felt like a river to flow in my cunt . At the same time I realized that sucking on this thing was not going to be enough to satisfy me and I envisioned what I would do next with my new found friend .
After sucking on the dolls cock until my jaw ached I decided to try fucking him so I got out of my halter top , shorts and panties . Although it's cock was pretty big I felt my pussy could accomodate the size and I knew I was wet enough by now that entry should be easy but I got out my bottle of baby oil just to be sure . I have never had a really huge cock in me and I don't let my girlfriends do me with really large toys as I wish to maintain my snug passage . It gives me so much pleasure to feel my vagina enveloping that just right "size" whether it be a real cock or a vibrator or even a strap on . This 8 incher made me a little nervous ! Anyway , I applied a little baby oil on the shaft and spread it around , especially on the head to facilitate entry . I mounted the doll and placed the "swollen head" at the entrance to my pussy and moved it up and down until the wetness covered all . Needless to say , I was incredibly wet by now and even the rubbing of the rubber cock on my clit sent shivers of pleasure through me . Here goes I thought !
I easily slid down all the way in one motion but slowly and steadily as it was the first time until it hit my cervix and I felt his balls on my ass cheeks . I laid like that for a while enjoying the feeling of fullness . It was great knowing that I would be calling all the shots and doing all the movements with no concern about my partner cumming too quick . Okay , time to fuck I thought . I slid up slowly but unfortunaly I felt the doll follow me somewhat due to the suction of my cunt . This was not good but I was so hot by now there was no stopping . I slid my knees up and forward and placed my feet above the dolls knees and slid my pussy down . This time when I moved my ass up the doll stayed in place . I started a slow rocking motion impaling myself on it's cock and then sliding my pussy up to where the head was against my clit . I moved around a little getting such joy from the contact then down again for the fullness . I was loving it so much and could feel my juices running over the cock to the point I could take no more and started fucking in earnest . I bent my lower torso to get the cock to contact my clit and began actually slamming down and lifting my ass rapidly . I knew I was going to cum and I felt it start deep inside me . When my orgasm hit me me , it hit with atomic force . I could actually feel my flow run down all over it's cock and thighs as I lay there trembling . What a fantastic cum ! When my orgasm finally subsided I lay there in wonderment that this could happen to me . Then something dawned on me . This cock was just as hard as when I started and would always be ready for more action unlike most guys ! I figured , what the hell and moved the doll onto the floor in front of my full length mirror .
Just as I finished washing the dolls cock again and was thinking of how I wanted to fuck it next my doorbell rings ! I answer it to find it was Lisa , one of my girlfriends . Lisa is gorgeous and probably the sexiest of all of them . She is of Italian descent , 5'2" , athletic body , dark skin , deep chestnut brown hair and an adventurous side . I quickly threw on my ivory full slip I had worn to work that day , closed the bedroom door and opened the front door to let her in . Her first question to me was , "are you all right" ? Yes of course I answered but realized what I must look like having just fucked and had a most memorable orgasm . She says , "you look and smell like you just had sex" ! I apologized and said I was thinking of our friends in Jamaica and got so hot I masturbated which was actually true . She stated she had been thinking of them also and had gotten hot and come over to see if I was up for a little action which I usually am but was especially so as what I had just done and was intending to do had left me craving for more .
I wasn't sure how to handle the bedroom situation as I wasn't ready to admit I had just fucked a rubber doll although as I said , Lisa does have a bit of a wild streak . I decided to just keep quiet about it . When we were both on our second glass of Chardonnay on my couch she started coming onto me and we began to kiss . We talked and kissed for a while before I decided it was time to let her know how much I wanted this . I tasted her tongue then gave her mine to suck on . This was to let her know I was ready to proceed as all my friends know , I don't like being hurried or pushed . She slid the straps of my slip down and caressed my breasts and nipples which were still a little hard from my sex before . I pulled her halter top up and off and did the same feeling the weight of her breasts by gently lifting each of them in my palm in turn and kissing them . Lisa has the most beautiful 36C breasts , and always goes braless and in no time I had her nipples as hard as pebbles with my caressing . She made on O with her lips and placed it over one of my nipples . She swirled her tongue around my entire nipple then flicked it over the hardening tip repeatedly and then moved over and did the same to the other one . Then she tried to suck my entire left breast into her mouth but her mouth is too small . Oh my , I can feel it starting again I thought as I felt the wetness once again begin in my vagina . After a while doing this she put her hand on my thigh and rubbed upward in a circular motion and I slowly spread my legs apart to give her access . She slid her hand all the way up pushing up my slip as she went toward her goal . She placed her hand flat against my pussy and exclaimed , "you've been doing more than masturbating haven't you ?" as she looked toward my bedroom door . It was then I realized how swollen and slippery my labia must be from the fucking . She all ready had me going so I figured what the hell .
I made her promise not to tell any of our other friends and brought her into the bedroom and showed her my new "toy" laying on the floor with it's cock standing at attention just waitng for more pussy ! She smiles and says " Oh WOW ! I see ! Oooo , how kinky !" as it became clear to her what had gone on . Our foreplay had us both excited so when I suggested we include my new friend in our lovemaking she promptly replied ok !
I wasn't quite sure how to start at this point so I asked Lisa if she wanted to mount the doll and having never done this she suggested I show her how to start . I said I would be happy to oblige with a smile on my face . I warmed the dolls cock again with a hot towel and mounted it and sat up straight making sure Lisa could see the cock entering my pussy . I once again put the head at my opening and started down . I thought I would be wet enough after the foreplay on the couch but found I had to rise up and go back down a couple of times to spread my wetness before its cock was all the way in me . With my eyes locked on Lisas I slowly began a rocking motion and soon felt the feeling beginning again . I think part of it was the strangeness of the situation and of course Lisas glazed eyes watching my every movement . "Heather , let me remove this " she said and I realized I had not removed my slip in my anxiousness . I nodded and she grasped the straps and gave a tug . As the fabric slid over my breasts it generated a little more arousal as my nipples were super sensitve by now . Smiling , I said "Lisa , let me remove these" referring to her shorts . When I had done this , she was standing there with only the cutest little bikini panties on and right in the center of the crotch was a big red kiss which without hesitation she pressed against my lips . This was all being reflected in my full length mirror and the view at that moment will always be in my mind ! I slipped her panties down to reveal her shaved pussy . Oh wow I thought . I could feel my orgasm starting in me as I continued to fuck the doll but Lisa would have no part of this . "My turn" she says and although I was reluctant to part with the doll , (Lisa can be a real demanding bitch) I slid up off the cock so she could have a turn . She shocked me by getting on the floor and putting her mouth over the dolls cock ! "I wanted to taste you and didn't want it getting cold " she said smiling . This was getting soooo hot ! She spun around and in one smooth movement impaled herself on the dolls cock . I think her saliva and my juices helped the entry . She started moving up and down and soon moans started escaping her lips . "I've had bigger but there's something about this cock that has my motor racing " she said . By now I was going crazy as my interrupted orgasm was not subsiding much . I placed my feet on either side of the dolls chest , bent back and offered Lisa my pussy . I held my labia open for her and she took the hint and started licking up and down my slit all the while fucking the doll . I didn't know where all this was heading but there was no way either of us wanted it to stop . She continued riding the dolls cock and licking my slit but it wasn't long before I felt her moving faster and I knew her orgasm was fast approaching . I whispered , "Lisa , slide your tongue in me as far as possible when you cum ". When her orgasm started I pulled her face into my open pussy . When she came it was as if it was me cumming for I felt every little tremor as they passed through her body right into the core of me . Why I didn't cum also I will never understand but the night was still young I thought with a smile . When she finally climbed off the doll she was pretty limp and headed for the bed . I beat her to it , spread my legs wide and up and said "Lisa , you have had me on the edge since the living room so put your mouth on my cunt and lick me until I cum !" She loves it when I talk that way . She climbed between my legs and placed the tip of her tongue right on my anus (she's a nasty little bitch and she knows how sensitive I am there) . After swirling her tongue around a while she moved up and put the flat of her tongue right on my openess , folded it and slid it into me . I was so damned hot and close that as soon as she placed her puckered mouth on my clit and ran her tongue over it I started to cum and cum and cum . This was truly an orgasm to match my earlier one ! When she finally moved her mouth off me a string of my juices connected her mouth to my slit like a cobweb . She slid up next to me and I could smell the result of our lovemaking on her face as we laid side by side . "That was soooo nice Lisa " I said and she replied with an mmmm snuggling up to me .
We chatted , kissed and caressed lightly keeping the mood alive and giving our bodies a much needed rest but it wasn't long before Lisas body temp. started to rise with mine right behind . Apparently Lisa wanted to skip the preliminaries and rolled me gently onto my back , turned her body around swinging one leg over me until I was looking directly into her pussy . It wasn't too difficult to see what she wanted . She spread my inner lips and put her tongue inside me rubbing my clit with her chin . This woman knows how to treat a sex partner right ! I wrapped my arms around her thighs and spread her cute little cheeks exposing both her anus and slit . I first gave her anus a little pressure with my tongue tip . This caused her to moan big time as she likes this as much as I do . I prefer the taste of cunt so I slid my tongue into her vagina which was as smooth as a babys butt due to her recent "shave" and like her found my chin pressing on her clit . I rocked my head back and forth sliding my tongue onto her clit , sucking for a while then back inside her tunnel as she lifted her ass to accomodate me . The feeling of her bald pussy on my lips and cheeks was driving me crazy ! She was doing amazing things with her mouth also . This went on for some time for we had both cum and wanted this one to be a slow easy fuck . I could feel her saliva and my flow running down the crack of my ass which heightened the joy . I knew what was coming so I lifted my thighs higher and wider . This of course allowed Lisa to easily pentrate my anus with a finger whereas I had to wet one of mine with her juices to allow easy penetration of her other hole . Lisas moans got louder and closer together and I sensed she was getting close and this got me hotter . We both inserted our fingers deeper into each others anus . She started licking me faster signaling that I should do the same. I did so and rocking to and fro we came together . It was the kind of moment only two women can share ! We kept our mouths locked to eachothers source of pleasure revelling in the moment until finally Lisa once again turned and lay next to me .
We finally got up and showered together . I then lit a candle and brought the wine into the bedroom where we had another glass . This was more in line with our usual lovemaking but the doll had added a nice touch . After finishing the wine Lisa said she wanted to fuck one more time . She's a hot blooded Italian and can be insatiable . I asked her if she wanted to fuck the doll or have me do her with my strapon . She chose the strapon because as she said , "the doll don't have tits !" and I laughed as I knew she loves my breasts .
"OK , wait a minute" . I went to my dresser and took out my toy slipped it around my waist and approached the bed . I personally think this must look a little foolish . Here I am an attractive woman with nice firm 34C breasts and a 7" cock sticking out from my crotch but Lisa is turned on by this as are my other girlfriends . I slid into bed and we once again started to kiss . She spent a lot of time on my breasts as she hadn't had a lot of time before and of course had my nipples rock hard as she licked and sucked gently on them . Then I took a turn doing the same . Lisas breasts are incredible as I said and I wasn't going to miss out on this . She held the back of my head as I kissed and sucked on hers . "Heather , I'm ready so lay on your back so I can ride you first ". I did so and Lisa swung a leg over me sitting up so I could continue caressing her breasts and worked the artificial cock into her slit . What a sight ! I watched glassy eyed as the "cock" disappeared into her pussy and on the upward motion she would open herself so I could see her inner lips and clit. Yipes , this was amazing I thought . On the down move she would press her lips inward to get max contact . We fucked like this for quite some time before I asked Lisa if I could fuck her for a while and she agreeed . Without losing contact we rolled over gently until I was on top . She wrapped her legs around my back and locked her heels together as I slid my toy in and out of her . As I fucked her we caressed eachothers breasts thumbing the nipples which were all rock hard at this point . I leaned down and sucked real hard on hers all the time pumping my butt up and down entering her pussy then pulling out to the very edge , hesitating then sliding back in again . She was loving this all the time moaning softly and telling me how much she loved me and loved fucking with me . This was one of those slow comfortable screws we both love but after quite some time I could sense that Lisa had decided she needed to cum and then she said "Oh my beautiful Heather , I feel it starting deep inside my cunt" . I started to pump a little harder for her sake but again she took charge , rolled me over onto my back . She started fucking in earnest riding my "cock" as her moans got louder . "Oh Heather , oh Heather I am getting close " she mumbled . I watched her fucking upright and saw why I loved her so much . Her eyes were slits , mouth slightly open breathing hard , truly gorgeous ! . "Oh my , oh my , Heather I'm cumming , I'm cumming " . She lowered her torso onto me so we were breast to breast as she knows I love this as it enables me to feel her tremors as they overtake her body . When her orgasm finally subsided and after a brief rest she removed the strapon from my waist , placed it on herself and fucked me (she on top of course) until I cum which didn't take very long as my orgasm had been building throughout our first strapon session . She rolled off me after a while , removed the toy and lay next to me and we lay in eachothers arms . We thanked one another for a most wonderful time and I suggested she spend the night as it was getting really late .
It was a Friday and I didn't have to go into my office Saturday and Lisa has her own business so could pretty much go in when she wanted to . This coupled with the fact that we were both utterly exhausted from the lovemaking with the doll and eachother so she agreed . Lisa sleeps nude as I do so that wasn't a problem but we found being after midnight all we both wanted was some sleep . After cleaning up we both slipped into bed and into eachothers arms . There was a little light kissing but as I said we were both exhausted so nothing more was going to happen this night . Just for chuckles though , just before Lisa nodded off I got the doll and put him into bed between us . His cock made a bump in the sheet that was covering us and we had one last laugh before Lisa entered dreamland with one hand on its cock .
Sometime during the wee hours I was having this incredibly sexy dream . I dreamed Lisa was fucking me with my strapon again and I swear I could actually hear her moans and the bed rocking . Something brought me out of my dream and there was Lisa riding that rubber cock . "I'm sorry . I was trying not to wake you by going slowly " she said . "I awoke really hot and needed just one more fuck". As tired as I was I was not going to miss this so I slid the sheet down over her magnificent body onto the floor . The moonlight was coming through the blinds and gave just enough light that I could see all . I don't think she or any of my other girlfriends have ever been more beautiful . She kept her pace down for my benefit and I layed on my side watching this gorgeous bitch fucking my doll . My hand eventually found it's way down to my pussy and I was surprised at the wetness I found there . She held off her orgasm to allow me to catch up for she wanted me to cum with her . She kept on fucking the doll slowly watching me as I placed two fingers into my pussy , stroked a few times and then lifted my fingers to my clit and rubbed it in a circular motion . After doing this a few times I realized this wasn't going to take long at all . I offered my fingers to Lisas mouth and she gently sucked on them telling me how much she loved my taste and my scent . I returned them into my tunnel and onto my clit and resumed with my other hand tweaking my nipples . I timed my penetration to her pumping and on the upstroke I would rub my clit vigorously then back in as she slid down . This went on for maybe five minutes when she moaned , "Oh god Heather , I'm going to cum again " and I was right there with her with my flow running onto the sheet . She slid onto me and we kissed as we shuddered together to an exhausting finish . We fell asleep in eachothers arms but before I did I peeked over at the doll and I swear it had a grin on it's face !