An attractive young woman is being examined by her doctor for a routine annual physical, during which he discovers severe rug burns on her knees and elbows. Doctor: "What are these from?" Woman: "I'm quite embarrassed to admit this doctor, but they're from doing it doggy style." Doctor: "I see. Perhaps you should consider something that's a bit easier on you ... Say, the missionary position perhaps?" Woman: "Well, I would doctor, but my dog's breath is so bad!"