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But experts caution that it is hard to interpret this information, because the study was not designed to look at this effect. Share or comment on this article Most watched News videos. They suggest the ability to detect foreign sources is an evolved system that often leads to unsuccessful pregnancies - via greater risk of preeclampsia - because it signals a disinvested male partner who is not as likely to provide for the offspring. The idea of "sperm competition," as it is called, is a familiar one in the animal world—there's lots of literature about it. The American team used stem cells taken from embryos in the first days of life but hope to repeat the process with slivers of skin. Of course, if a man has sex with a woman twice in quick succession, then there is the risk that he will displace his own semen. Importantly, these chronically condom-less, sexually active women also evidenced fewer depressive symptoms than did those who abstained from sex altogether.
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This lends meaning to the term "sloppy seconds": If men have evolved adaptations to thwart women from having other men's children, what is to stop women from evolving counter-adaptations? Sweet chick letting a group of guys masturbate around her and blow spunk on her beautiful face on a white bed. Dildos featuring a coronal ridge, like a real penis, displaced 91 percent of semen that got there first. Both of these behaviors help keep men from accidentally removing their own goods. Advertisement Women aren't consciously playing out these underlying reasons for their urge to cheat, of course. The researchers speculated that when a man has sex with a woman who has recently slept with another man, the first man's semen is pulled out with the second man's penis because it gets caught behind the second man's coronal ridge, which separates the head of the penis from the shaft.
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Smallt-titted red bitch in stockings and corset takes bukkakke from a football team Kinky blonde slut gets face and pussy slammed Violated cutie is stuffed and cum soaked This blue-eyed beauty just loves the feeling of a big cock in her mouth and cum all over her face. A husband isn't likely to be more sympathetic when his wife tells him that evolution made her do it. Not that men are aware that they're doing this. Dildos featuring a coronal ridge, like a real penis, displaced 91 percent of semen that got there first. This horny brunette just loves deepthroating a big cock until her comes all over her face.
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Description: Cheating for evolution's sake is one thing; getting caught on an individual basis is another. This lends meaning to the term "sloppy seconds": Not that men are aware that they're doing this. The quality of the child, then, wins over quantity. But researchers believe that men have evolved ways of preventing this from happening—for instance, men usually need to "recover" for a few hours between orgasms, and they rarely continue to thrust after they ejaculate.

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Views: 5013 Date: 14.10.2017 Favorited: 5 favorites

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