A hard head makes a soft ass - A hard head makes a soft ass is when someone won't take advi

A hard head makes a soft ass is when someone won't take advice and ends up getting their ass kicked.

My brother won't take advice. He's gonna get his ass kicked. A hard head makes a soft ass.

My friend is too dumb to listen. He's gonna be the joke. A hard head makes a soft ass.

My kid is too stubborn to take advice. He's gonna get knocked around. A hard head makes a soft ass.