Bill had just completed the best round of his life. He decided to stop by his parents' house to tell them of his accomplishment. As he got out of the car and walked around to the back porch, he noticed that his father was sitting in his rocking chair, naked from the waist down.

Bill asked, "Dad, what is going on?"

There was no reply. His father just sat there rocking back and forth.

Bill asked again, "Dad, you are sitting out here with nothing but a shirt on. Why are you doing this?"

His father turned to him and said, "Last week I sat out here without a shirt on and I got a stiff neck. This was your mother's idea."