A man goes to visit his doctor and explains he has a mole on his penis. He tells the doctor how much it is distressing him and asks the doctor to remove it.
The doctor, being a sensible sort, asks the man if he’s sure he wants it removed and makes between the two of them they figure out that he wants the mole removed and not his penis. This near disaster averted, the man pulls down his trousers so that the doctor can examine the mole.
“I’ve got some good news and some bad news, I’m afraid.” says the doctor after examining the man. “The good news is that I can easily remove the mole without damage to your penis. The bad news is that I have to report you for cruelty to animals.”