Men have nipples. They can be kept, as is a commonplace with breast augmentation surgery. This is asexuality. Their pronoun should be "it."

In fact, now that I think of it, the root of all this insanity may be a fundamental phobia about sex, its characteristics, its manifestations, and its obligations (procreation and family). True men want to become fathers. True women want to become mothers. What is going on is a lemming-rush away from being men and women.