One day grandpa says to grandma "Why don't we go to the motel like we used to do when we were young and get kinky?"
So they get to the motel and go into the room.
Grandpa takes off his glasses and says he going to get into the shower to freshen up. In the meantime grandma takes off her clothes and gets into bed. She decides to do some leg stretches to limber up ( it's been awhile ). Well she throws her legs over her head and they get caught in the headboard.
Right then grandpa walks out of the bathroom and sees her that way. "My God woman" he says "you need to put your teeth in and comb your hair, you look like an asshole!"