He's a Nine

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 10. "Sorry to spoil your evening," said his friend, "but when I walked in they were speaking German."