Tapeworm
I know this because A Friend tells me he used to know this Ethiopian chick who had a tapeworm and no medical remedy was working.
She was advised to use the Cookie Technique
Every day for two weeks at 3pm sharp she stuffed a cookie up her ass
On day 15 her friend gets a hammer while she withholds the cookie at 3pm
At 3:05 the tapeworm sticks it's head out and cries, "Where's my cookie??"
WHAM!