When a little son says, "le't play dolls and I want to be the mommy", a wise dad says, "No, you are a boy and someday you are going to be a dad. You can be the dad."
When a little boy says to his dad, "I want to be a princess", a wise dad says, "Son, you are not a princess and you can never be a princess. You are the Prince and here's your sword."
When a little boys says, "I want to feel pretty". The wise dad says, "You're handsome. There's no time in your life that you should feel 'pretty'. You are going to be a man and men don't make pretty. Girls are pretty. That's how God made them. God did not make you to be a girl. He made you to be a boy and that's what you are going to be."
When your boy wants panties. You say no. Then you find out what person is putting this into his head.