girl talk

two checkout girls in a supermarket talking.1 girl said that she can tell if a man is single or married.just by looking at what he has bought.the other girl said i dont believe you.the first girl said well watch this.just then a man came through the checkout.the girl said to him.pardon me sir you are single arent you.the man said. wow how did you know. the girl said.cause your realy f...ing ugly...