Quote from Monica in The One with Phoebe's Uterus
Monica: All right. You could start out with a little one. A two. A one, two, three. A three. A five. A four. A three, two. Two. A two, four, six. Two, four, six. Four. Two. Two. Four, seven! Five, seven! Six, seven! Seven! Seven! Seven! Seven! Seven! Seven! Seven! Seven! Seven! [holds up seven fingers and mouths "Seven"]