Commonly referred to as swamp ass, this is a condition that affects millions of people worldwide. Most commonly infected are athletic males and the obese. This disease is caused by an insufficient wipe of the anus after a poo, and later exposure of the dingleberries to the intense heat generated in the sauna, that is an ass crack. Athletic activity or fatness can intensify the moist heat generated in anal cavity, thus increasing the potency of the alligators.
Symptoms of alligators include monsterous dingleberries resembling alligators, a slick sweaty sensation between the ass cheeks, and in severe cases, a bog-like, swampy stench eminating from the backside. The Afghani Sauna effect.
It should be noted that attractive females are immune to alligators being as they dont go poop, and therefore don't get dingleberries.
Tom: Dude I've got some wicked alligators crawlin' around in my butt right now.
Jose: Si senor. You should try to wipe next time.
Fat Man: Bla! Im so fat I can't wipe my ass! Now I have alligators.
Hot Chick: I don't get alligators cuz i doon't poop. Yay!