An old man was sitting on his porch in the cold with just a shirt on, NOTHING under the waist.
His teenage grandson came up and asked, "Grandpa, WHY are you sitting out here in the cold naked from the waist down?"
GramdPa replied." Well sonny... yesterday I was sitting out here without a shirt on and later my elbow got real stiff on me!! This was your GrandMa's idea !"