What is the major purpose of a nipple? And why do men enjoy them?

What is the major purpose of a nipple? And why do men enjoy them?
Well when babies are growing in the mommy, they adjectives look the same till a secure point. I can't remember how long into it...but at a certain point the child will become a boy or a girl. Before afterwards.the baby have devolpment for breasts and a penis.
When the baby have a sex appointed, a boy's breast devolpment would stop. A girl's penis would turn into a vagina.
For women they are for nurturing their young...mens nipples, however, are useless...Lord solitary knows why he put nipples on men.
evolutionary problem.
Who know why men were born beside nipples. They're absolutely useless for anything bar pleasure to a man. Kind of like an appendix. You don't use it, you don't involve it, so what's the point other than to create you problems later within life.
The primary purpose of a nipple is a way for milk to exit the breasts for breastfeeding. As to why men own them, science is still debating.
Because up until a certain point within our development men and women are anatomically equal then at hand comes the x/y thing and poof.
To nurture babies. Men have them from inheritance, but evolution has made them so they no longer work as men do not really have need of them.
To nurse the young so they can find it smoothly.
men have them b/c surrounded by the womb we all start as feminine. The changes that pocket place for men do not include eliminating the nipple. No plea really.
For piercing.