A couple has sex. When they're done, the girl looks in the box of condoms and sees only 6 left out of 12. She asks, "What happened to the other condoms?" The guy says, "I, uh... I made balloon animals out of them for my niece and nephew."
The next day the girl's at work telling the story to her co-workers. She turns to one of the guys and asks: "Have you ever done that?" He tells her, "Sure. All the time."
She can't believe it so she argues: "Really? You make balloon animals out of condoms?"
He says back, "No. I thought you were asking if I ever lied to my girlfriend."