Why Penis Sizes Vary

Why do men's penis sizes vary so much? In many animal species, adults look almost identical,

yet humans show wide differences. Scientists point to three main causes. First,

sexual selection. Over generations, mate choices based on visible traits like height,

symmetry, and sometimes genital cues can amplify variation. Second,

prenatal hormones. Higher testosterone exposure at critical stages in the womb affects how reproductive

organs form. Third, genetics and chance. Random gene combinations mean even brothers

can differ a lot. Biology, evolution, and a bit of luck all together.

Makes you think, right?