How come all the hot girls are stupid?

Now I know people aren't this stupid and I know people say things and regret it, konk themselves on the head later and say, "Did I really say that?" So you have to give some people some slack. But if you say something that makes a blogger blow a blood vessel in her brain while trying to suppress uncontrollable laughter until she gets to the parking lot, it's gonna be blogged about. It pretty much has to be. Because if I sit on this conversation I had with a gas station cashier, let it just bounce around my head with no where to go, it might cause irreversible brain damage.
Conversation (Boy #3 is with me the whole time):

Cashier: Can I help you?
Me: Just these.
Cashier: That's $3.79.

Digging through my wallet, I find my money and a fist full of coffee cards.

Me: I think one of these cards is yours, is it this one?
Cashier: No.
Me: Huh, I thought this was the card for here.
Cashier, seriously, this is what she said: I can stamp it for you, I thought you were asking if it was mine personally.

At that time it was really a bad idea to make eye contact with Boy #3, but I did it anyway. And we really should have left the store immediately but I had to get my coffee card stamped. Sometimes if you raise your eyebrow really high and open your eyes really wide you can keep from laughing. And that's what I did.
Once in the parking lot though....... "Oh yeah this is your card, I've had it for a couple months now and thought you'd like it back."
"Why would she think you had her card? She doesn't even know you? How stupid was that?"
"Way stupid, Oh My God."
"How come all the hot girls are stupid?"
"Yeah, I saw you checking her out, don't bring stupid girls home to meet me okay? I'll come up with some kind of stupid girl test for you okay?"