basically like. why do women just have breasts all the time when to my knowledge the only purpose of them is to feed children. why don’t they go away like other mammals’ when you haven’t had a child.
In: Biology
Probably sexual selection.
Plenty of mammals – and non-mammals for that matter – have secondary sexual characteristics that serve no known purpose except to attract the opposite sex.
It makes perfect sense that our switch to walking upright could’ve coincided with the development of such secondary characteristics closer to our new eye-level than whatever was there before.
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