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Unconvinced? Well, Baker and Bellis are clever empiricists. Finally, if younger sperm live longer in the female tract, any enhanced fertility and competitiveness would also last longer. Moreover, once retained in the female tract, younger sperm could be more fertile in the absence of sperm competition and/or more competitive in the presence of sperm competition. The advantage to the male could be that the younger sperm are more acceptable to the female and/or are better able to reach a secure position in the female tract. In a now-classic, pre-Internet-porn (I’ll get to that later on) study by British evolutionary biologists Robin Baker and Mark Bellis, male university students were found to masturbate to ejaculation about every 72 hours, and “on the majority of occasions, their last masturbation is within 48 hours of their next in-pair copulation.” If they’re not having intercourse every day, that is to say, men tend to pleasure themselves to completion no more than two days prior to having actual sex.īaker and Bellis’s quite logical argument for this seemingly counterintuitive state of affairs (after all, shouldn’t men try to stock up as much sperm as possible in their testes rather than spill their seeds so wastefully in a rather infertile swath of toilet paper or a dirty sock?) is that because there is a “shelf-life” for sperm cells – they remain viable for only 5-7 days after production – and because adult human males manufacture a whopping 3 million sperm per day, masturbation is an evolved strategy for shedding old sperm while making room for new, fitter sperm. When it comes to sex, we put this capacity to very good-or at least, very frequent-use. It requires a cognitive capacity called mental representation (an internal “re-presentation” of a previously experienced image or some other sensory input) that many evolutionary theorists believe is a relatively recent hominid innovation. This conjuring ability to create fantasy scenes in our heads that literally bring us to orgasm when conveniently paired with our dexterous appendages is an evolutionary magic trick that I suspect is uniquely human. Rather, if you really want to know about a person’s hidden sexual desires, then find out what’s on his or her mind’s eye during the deepest throes of masturbation. Dreams with erotic undertones are like most other dreams during REM sleep-runaway trains with a conductor who is helpless to do anything about the surrealistic directions they take.
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Now Freud might raise his eyebrows at such a lurid dreamscape, but if these images represent my repressed sexual yearnings, then there’s a side of me that I apparently have yet to discover. “Does it make me look too feminine?” “Not at all,” she assured me, “it’s a man’s dress.” Counselling and sex therapy might help.There must be something in the water here in Lanesboro, Minnesota, because last night I dreamt of an encounter with a very muscular African-American centaur, an orgiastic experience with – gasp – drunken members of the opposite sex and (as if that weren’t enough) then being asked by my hostess to wear a white wedding dress while giving a scientific keynote presentation. You could look at different ways of enjoying sex and being intimate. So if the prostate gland is no longer there, anal sex might feel different. Some men can find the penis rubbing against the prostate gland pleasurable. If you are used to having anal sex and you are the receiving partner, surgery to remove the prostate gland can change this experience. Some men say that it feels different but they have managed to find ways to adjust to this. The loss of a visible ejaculation can be significant for some men and their partners. But other men find that their orgasm is less intense and pleasurable. Some men say that a dry orgasm without semen feels normal. You are still able to have an orgasm, but it will be a dry orgasm. Your testicles will still make sperm cells but they will be reabsorbed back into your body. The seminal vesicles make the liquid part of the sperm. This is because the prostate gland and 2 glands called the seminal vesicles are removed. You no longer ejaculate semen if you have had a radical prostatectomy.