A man was walking down the street when he noticed his grandpa sitting on the porch, 
with nothing on from the waist down. "Grandpa, what are you doing sitting out here 
with nothing on below the waist?" he asked again. The old man slyly looked at him 
and said, "Well, last week I sat out here with no shirt on, and I got a stiff neck. 
This was your Grandma's idea!"