A guy was meeting a friend in a bar, and as he walked in he noticed two pretty girls looking at him.
He heard one girl say to the other, “Nine. “
Feeling pleased with himself, he swaggered over to his buddy at the bar and told him that the girl in the corner had just rated him a nine out of ten.
“Sorry to spoil your evening, “said his friend, “but when I walked in they were speaking German”
This joke is included in the Black Book of Jokes. You can order it from here.