A blond joke.

[lietuviai]

A blonde manages to push her Mercedes Benz into a gas station. She tells the mechanic it died. After he works on it for a few minutes, it is idling smoothly.
She asks, "So what was wrong?" He replies, "Just crap in the fuel tank."
She asks, "How often do I have to do that?"

heard it before. but it's right up there with locking the keys in the convertable