A guy goes into a supermarket and buys:

* one can of beans
* one bag of potato chips
* one pack of burgers
* one tub of icecream
* one cake
* one yogurt
* one pint of milk.

He takes them over to the checkout, and the girl looks at what he has bought and asks if he is single.

The guy says sarcastically, "Yes. However how did you guess?"

The girl replies: "You're an ugly bastard."