Don't be afraid.
As a man in the making, his father would always tell him to not be scared of anything; that girls didn't like a boy who was frightened easily. So he listened.
No one likes a weak boy. You have to be strong and have a good body in order for someone to appreciate you. (It helps if you're good looking too.) So he listened.
He was taught not to cry; because boys don't cry. It's best to leave the act to the woman. So when he was lonely, he didn't cry. When he was hurt, he didn't cry. Like this, he listened.