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The difference between developing as a normal male and being intersex can be down to a single gene. briansuda

Ambiguous genitals? You may have wrinkly genes

Sex in mammals, including mouse and human, is determined genetically and depends on the paternal sex chromosome - X or Y - received at the time of fertilisation. If nothing goes wrong, an XX individual…
Warning: This article may contain traces of jokes about penises – most unintended. Lynie

Penis size may be driven by women (oh, and it matters)

How important is penis size? Authors from the Australian National University, Monash and La Trobe provide the most complete answer yet: the size of a flaccid penis can significantly affect how attractive…

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