A young husband walks into the bedromm, about 8PM, extends his hand toward his wife. She spies two white pills in the palm of his hand. "What's that in your hand, honey?" asks the wife, a bit confused. His succinct reply: "Aspirin." "Oh, but honey - I don't have a headache." she explains. His succinct reply: "Ah hah!"
I didnt get it at first, but then i realised, according to what ive seen on tv, wifes often get out of sex by claiming they have head ache... then it made sense...