A woman is at the checkout in a supermarket and puts her purchases on the conveyor. Behind her in the queue, swaying slightly, is a drunk. The drunk looks down at her shopping and says to her, "You're single, aintcha?"

She looks at the goods on the conveyor, bread, milk, eggs, muesli and a few other things and can't see what would lead him to that conclusion. She decides to play along, "Why yes," she says. "How did you guess?

"Cos you're ugly." says the drunk.