"Woman was made FOR the man. She was GIVEN TO HIM, not the other way around."
I know we have had this discussion before here, but why do men have nipples is a good question. All embryos start out female, after the testosterone kicks in from the Y chromosone, the male characteristics come about. The nipples on men are just leftover from the female design. They haven't been evolved out because they don't cause the male any disadvantage to his survival.
I use this argument to get my husband to yield to me :P