Why do men have nipples?

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@pedro_pistolas

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Why do men have nipples?
« on: 06/04/2011 00:30:02 »
@pedro_pistolas asked the Naked Scientists:
   
How come men have nipples? What purpose do they serve?

What do you think?
« Last Edit: 06/04/2011 00:30:02 by _system »

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Offline graham.d

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Why do men have nipples?
« Reply #1 on: 09/04/2011 16:53:56 »
Evolution does not demand that everything has a purpose. As long as it's not a disadvantage there is no reason why elements should disappear. Differentiation between the sexes in the  foetus is a fairly subtle redeployment of cells. It would be a more complicated process to make larger and unnecessary changes. This may well be a good reason why male nipples persist.