"I've been to so many specialists and no one can seem to get rid of it."
The doctor thinks for a few moments and says, "OK, come back next week with a banana and a cookie."
The man is confused but, having been failed by every conventional treatment, goes home and returns a week later with a banana and a cookie.
"Drop your pants and bend over the table," says the doctor.
"What the hell are you doing?" the man asks.
"Trust me," says the doctor.
The man, a little distressed, does as he's asked.
The doctor shoves the banana up his ass and then a couple of minutes later shoves the cookie up as well.
"Come back in a week with another banana and cookie."
The man is unsure about the treatment but, again, has tried everything else and wants to get rid of this tapeworm.
The next week he returns with another banana and cookie.
"Drop your pants and bend over the table," says the doctor.
After 3 weeks of this the doctor says, "OK, next week will be your final treatment. Bring me a banana and a hammer."
The man comes back with the requested items.
"Drop your pants and bend over the table."
Trembling, knowing what's coming, the man does as he's asked.
The doctor shoves the banana up his ass and waits... and waits... and waits...
Eventually, the tapeworm sticks its head out and yells, "Where's my cookie?"
And the doctor smashes it with the hammer.