German Girl's Annoying Habit

Okay, listen up, buttercup. This joke is playing on the fact that when a German girl screams her age, it sounds like "nein," which means "no" in German. It's funny because it implies she's both screaming her age and saying no while moaning, making it sound like a weird situation. Now, wipe that confused look off your face; you look like you're trying to solve a math problem.