"It's basically akin to someone sitting on their couch and chewing up food and spitting it all over the floor and the walls and the furniture...."

"... month after month until it piles up and congeals and grows into mold, turning the room into a repulsive, health-threatening mess."

Guess what "it" is.

Then go to the link, see what it is, and help me understand what sort of bizarre mind would come up with that simile.