This fellow goes to the doctor and says "Doctor, I've got a rash round my cock, have you got anything for it?"

The doctor said "put this on and come back next week if it doesn't work."

The guy comes back the next week and the cream hadn't worked so he tells the doctor and the doctor gives him more cream and tells him to come back next week if it doesn't work.

The guy comes back and the cream still hasn't worked so the doctor says "Drop your pants."

The man drops his pants and the doctor has a look and tells him to put a different cream on. The man then says "Doctor it's worked!! What was that?"

The doctor replies "Lipstick remover"