How the 'fe might be useful for once

sleep_chvd said:
>Using a sample of 652 college students, we examined several implications of the hypothesis that the shape of the human penis Using a sample of 652 college students, we examined several implications of the hypothesis that the shape of the human penisevolved to enable males to substitute their semen for those of their rivals. The incidence of double mating by females appears evolved to enable males to substitute their semen for those of their rivals. The incidence of double mating by females appearssufficient to make semen displacement adaptive (e.g., one in four females acknowledge infidelity, one in eight admit having sufficient to make semen displacement adaptive (e.g., one in four females acknowledge infidelity, one in eight admit havingsex with two or more males in a 24-hour period, and one in 12 report involvement in one or more sexual threesomes with two sex with two or more males in a 24-hour period, and one in 12 report involvement in one or more sexual threesomes with twomales). We also document several changes in post-ejaculatory behavior (e.g., reduced thrusting, penis withdrawal, loss of males). We also document several changes in post-ejaculatory behavior (e.g., reduced thrusting, penis withdrawal, loss ofan erection) which may have evolved to minimize displacement of the male’s own semen. Consistent with predictions derived an erection) which may have evolved to minimize displacement of the male’s own semen. Consistent with predictions derivedfrom a theoretical model (Gallup and Burch 2006), we discovered that most females report waiting at least 48 hours following from a theoretical model (Gallup and Burch 2006), we discovered that most females report waiting at least 48 hours followingan instance of infidelity before resuming sex with their in-pair partners. an instance of infidelity before resuming sex with their in-pair partners.
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Why would a baby research peepees
 
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