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Scientific American columnist Jesse Bering focuses today on a new hypothesis about the design of male testicles. Evolutionary psychologists Gordon Gallup, Mary Finn and Becky Sammis have their "activation hypothesis" published in the...
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The development of the birth control pill in the early 1960s revolutionized human sexuality. More than 40 years later, scientists are beginning to wonder if the pill is having an impact on more than just menstrual cycles and sexual activity. Some...
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Most people would assume that, in general, sex and babies are the main reasons people historically started getting married. But a new book by evolutionary anthropologist Richard Wrangham suggests that men and women have a more important bond...
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For you ladies out there who like to indulge your sweet (ahem) tooth with eye candy, don't expect to spawn much in the way of fruit from your loins. New research suggests that attractive men produce less sperm during sex than ugly men. Call it...
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A study has "proven" what many have long suspected: size does matter when it comes to female orgasms. However, it's not the size of one's manhood but the size of one's bank account that will give her the bigger and better O. The New York...
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"But it's unnatural!" is the all-too familiar cry of moralists who want to register their objections to whatever sexual behavior upsets them most. We suspect that if they could get away with it, there are those who would claim that even heterosexual...