A married couple on vacation in America. The bloke walks by two hot chicks and vaguely hears one of them whispering to the other: "nine".
He straightens his back proudly and steps to his wife and says:
- See those girls there? They rated me 9 out of ten!
- Yeah. - replies his wife - I also heard them talking before. They are Germans...
The joke is German chicks aren't hot.