penis
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You Need More Than Just Testes To Make A Penis
In prenatal ultrasounds or at delivery, many new parents look between their baby’s legs: The presence of a penis is taken as a strong sign that it’s a boy. For humans and other animals, development of a penis was thought to be driven by “male hormones” (androgens) produced entirely by the testes of the male…
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Certain Penis-Dwelling Bacteria Might Increase Your HIV Risk
“A health worker counts antiretroviral drug tablets for a patient at The AIDS Support Organisation (TASO) in the capital Kampala, Uganda” – Image: AP HIV transmission is a complex process with factors beyond just who you sleep with and how. The virus ultimately needs to find its way to the correct kinds of cells in…
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New Research Suggests Monogamy Killed The Penis Bone In Humans
Although we call erections “boners”, anyone who has basic familiarity with human anatomy knows our slang deceives us — for unlike most mammals, men have no penis bones. For decades scientists have wondered, “Why no penis bone?” A new study published in Proceedings of the Royal Society might finally answer the mystery of what killed…
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This Is Why Cat Sex Seems Kinda Brutal
Cat sex videos are all the same. The tom mounts the female, she arches her back and moves her tail aside — a response called lordosis, by the way — and the two of them get down to the act. But soon afterwards, the yowling starts, followed by the spitting and swiping. Why so angry,…