Grandfathers Dongle

A man came to visit his grandparents and he noticed his grandfather sitting on the porch, in the rocking chair, wearing only a shirt, with nothing on from the waist down.

"Grandpa, what are you doing? You're dongle is out in the wind for everyone to see!" He exclaimed.

The old man looked off in the distance without answering. So he asked again.

The old man slowly looked at him and said, "Well...last week I sat out here with no shirt on, and I got a stiff neck. This is your grandma's idea."