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Men's nipples are probably useful for the same reason many electronic products have various things on their circuit boards that aren't used: on those products,
by midoridensha 4y ago
Men's nipples are probably useful for the same reason many electronic products have various things on their circuit boards that aren't used: on those products, it's cheaper to manufacture a single circuit board to cover multiple variations of the product, and just attach the components needed for that particular model, leaving the rest unused. Genetically, it's probably easier for men and women to just share the same genetic code that produces nipples.
- anenefan 4y agoI understand but it was less fun to go down the shared male / female development path of why men end up with nipples :) The fact that men can lactate under unusual conditions has made me rethink using the idiom "as useless at tits on a bull" ... but I'm fairly sure that a bull would not let a hungry baby calf nuzzle long enough for it to find the bulls nipples.
- Jerrrry 4y agoExactly, it would take a costly mutation with dubious benefit - and since there is no selective advantageous pressure (men without nippples arent that _more_ attractive, definitely not enough to warrant the mutation) they continue to exist.