Grandma's Idea

A man walks up to his house and notices his grandfather sitting on the porch, in the rocking chair, with nothing on from the waist down.

“Grandpa, what are you doing?” he exclaims. The old man looks off in the distance without answering. “Grandpa, what are you doing sitting out here with nothing on below the waist?” he asks again.

The old man slowly looks at him and says, “Well, last week I sat out here with no shirt on, and I got a stiff neck. This is your grandma’s idea.”