Why do we men have nipples ?

The foetus isn't male or female at the stage of sex determination, although female development is the default if no testosterone is produced. Unfortunatley I can't copy and paste Campbell & Reece. :p

The point made was that nipples are produced before the stage of sex determination
 
They are there cause we would look very strange without them!

People just think that because they're there, if they never were no one would be the wiser, though if you look at humans we can appear pretty odd in general, im reminded of rodents if i scrutinise someone on the tv for too long, you can view things from a more alien or neutral perspective if you try, give it a go, humans do look rodent like!
 
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