I know you will all be able to understand this one...
A preacher was out for a walk and as he turned the corner of a building, he saw a young man that was repeatedly bashing his head into the brick wall of the building. He was covered in blood and was staggering but would determinedly stand back and run at the wall and smash his already battered head into the bricks.
The priest was horrified and he grabbed the young man and stopped him. "Son, for the love of God, why are you doing this?"
The young man smiled through the blood and said "Because, it feels so good when I stop!"
Been there, done that...