Hiya Billy!
OK, so this old guy isn't feeling too well, and his wife brings him to the doctor, who examines him from head to foot.

"Right," says the doctor, "we're going to need a blood sample, a urine sample and a stool sample."

The old guy turns to his wife and asks, "What did he say?"

She replies, "Show him your underwear!"

Seamus (who is a card-carrying member of AARP)