She's Probably Right (She Usually Is)

Julie: So what are you getting me for Christmas?
Me: I can't tell you. It's a surprise.
Julie: Is it one of the two things I've told you I want but didn't just go buy myself?
Me: No, it's something else.
Julie: How can you know it's something I want if I didn't tell you?
Me: I came up with it on my own - I used my brain.
Julie: You no have brain!