Sherlock Holmes and Dr. Watson are taking a shit... When they are finished Dr. Watson turns around and notices only one pile of crap on the floor. ""Look at this Holmes... Instead of two piles on the floor there is only one. This is very strange!"". Sherlock Holmes ponders for a few seconds, takes a few puffs of his pipe, turns to the Doctor and say ""Its elementary my dear Watson! You forgot to take your pants off"".