Single man at the supermarket

A young man went shopping. He bought a small can of corn, a small can of tuna(金枪鱼）, a small jar of mayo（蛋黄酱）, a small lemon and a very small box of teabags. When he came to the counter the girl at the cashregister smiled at him and said; "Dearest, You must be single."

"Why, do You mean because I buy so little food?"

"No, because You´re so goddamn ugly..."