This beautiful blonde went to her doctor complaining about pain in all her joints. The Doctor went through a whole series of tests and couldn't find anything wrong with her. After he had explained this to her he said: "There has to be something else, have you recently changed anything in your lifestyle?" She said, "Well, the only thing I know of is that I started making love Doggie Style, could that be causing it?" The Doctor said, "Maybe, why don't you stop it and see if you improve?" She said, "I can't, that's the only way my dog knows how to fuck."