An old man finds a condom in his grandson's apartment and asks what it is.
"It's a condom," replies the grandson, sheepishly.
"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 the pharmacist for a condom.
"What size would you like?" asks the pharmacist.
"Big enough to fit a Camel."