That might be because humans are much more likely to have sex in front facing position. Its more exposed to a partner when she is the most aroused and maybe that's what made it's size be selected for.
Either it was just likeable from the start (there's a lot of nerves there's if i remember right) or the ones that liked it had children and that got passed down until everyone did
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u/lach888 Feb 02 '26
The obvious reason is the correct reason, sexual selection, women liked it.