Who's the asshole here?

The scene: I'm at Walgreens buying dried cranberries, a cream soda and a small tin Spider-Man lunch box (impulse buy). A very attractive woman in a hurry and a short skirt -- the type who probably is used to guys being awfully happy to help her out -- taps me on the shoulder and says, "Can I go ahead of you? I only have one thing."

I say, "I've got three," and turn my back. I can't deny enjoying the annoyed noise I heard behind me.