Unpeeled Jokes

(This is one that was told to me by an American when I was in Germany, 30 years ago)

This man had a great pain in his tummy, so he decided to go and see his Doctor.
The Doctor examined the man's stomach and proclaimed that he had a huge worm therein. It was a monster of a worm!
The Doctor told the man that there was only one way in which to get rid of it, and asked him to come back the next evening at 5 pm and to bring a banana, a hammer and a cookie when he comes.
The man exclaimed, "A banana, a hammer and a cookie?" and the doctor replied, "Yes, a banana, a hammer and a cookie.
The man went away puzzled and came at 5pm the next day with a banana, a hammer and a cookie.
The Doctor took the man into his surgery and asked him to take off his pants and to bend over. He then unpeeled the banana and shoved it up the man's arse and beat it right in with the hammer, started a stop-watch and exactly five minutes later he shoved the cookie up more...