A man came to visit his grandparents. 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? Your weenie is out in the wind for everyone to see!" he exclaimed.

The old man looked off in the distance without answering.

"Grandpa, what are you doing sitting out here with nothing on below the waist?"

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."

oh, and nice avatar, as always.
[Edited 11/9/06 18:49pm]

That reminds of the lady who tells her husband she wanted bigger breasts. He says "why don't you try rubbing toilet paper between them every day".
She looks at him, perplexed, he shrugs and says
"Well, it worked on your arse!"