Condom and an Old Man

An old man finds a condom in his grandson's room and asks what it is. "It's a condom," replies the grandson. "What do you use it for?" asks Grandpa. The grandson is embarrassed, so he says,"I use it to keep my cigarettes dry when I smoke in the rain." Grandpa says, "That's a great idea." He goes to the drug store and asks for a condom. "What size would you like?" asks the pharmacist. "Big enough to fit a Camel."