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The more a woman has sex with her partner, the more committed she becomes, and the less attracted she is to other men — at least in the short-term. I blogged about this study several weeks ago and offered explanations both hormonal and psychological. But another theory came to my attention today in the form of a study on fruit flies.


For decades, scientists have known that female Drosophila reject sex after they come into contact with seminal fluid. This may give a reproductive edge to the first male with whom she has sex. A study led by Geoffrey Findlay at the University of Washington has finally shed some light on the phenomenon. Apparently, there are proteins in seminal fluid, many of which transfer to the female’s system after sex. Some of these proteins are apparent warriors — they fight the sperm of rival males. Other proteins are like hypnotists — by affecting the female’s hormones, they dampen her interest in sex with other males. Somewhat disturbingly, the more semen a female is exposed to, the more influence the male has over her reproductive tract and her mating behavior. Semen, it seems, has mind-control properties.




So what does this mean for humans? The same study hasn’t been done on men and women, but researchers speculate that many of the same proteins are in the semen of human males. “Does semen make you happy?” is one of the questions posed in BLONDES. In answering it, I describe a fascinating study at SUNY Albany that found that, yes, women who are regularly exposed to their partner’s semen are less depressed than women who use condoms most of the time. Hormones and proteins are absorbed through the vagina, enter the bloodstream, and possibly breach the blood-brain barrier. Are there mind-altering factors in men’s semen that manipulate women’s minds in the way that fruit fly spunk affects female fruit flies? Perhaps, but it would be hard to prove. Women’s love lives (and psyches) are a little more complicated than those of Drosophila. After all, a woman in love with the man she sleeps with would be happier and more faithful anyway. It’s a puzzle for all scientists who study human sexuality: Where to draw the line between chemical love and Eros? The seminal and the sacred?


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That is interesting about the effects of semen on drosophilia, but I would definitely agree that the humad body is much more complex than a fruit fly, thus extrapolating said affects on fruit flies to women would be a jump!


Mind control via sex...

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The more a woman has sex with her partner, the more committed she becomes, and the less attracted she is to other men


Makes sense to me then, not to have sex with men. When we aren't committed to anyone, they can't hurt us....no sex would save a lot of grief for women.



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Well the study that said women that don't use condoms are happier I think you can have other explanations for that. When you don't use condoms it often means that you are in a steady relationship and trust the guy more so offcourse it is going to affect your degree of happiness.


Also, it is said that after sex female body release a hormone that make her attached to the guy, this can go hand in hand with how semen functions. What I think is although many of our behaviours is related to chemicals in our body, seeing the difference between generations just show you how much what happens to you outside of your body is important to how you are going to act. So many girls these days cheat or have multiple sex partners and are going against what hormones want.

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