Scat

scat 

feces, shit, poop, excretement, hershey highway hangers, pooh, crap... the stinky stuff that comes out of your ass.

Some people are turned on or sexuality excited by scat, others use scat as a method of disicpline or humiliation. Scat content is somewhat popular in Japan, but for the most part is either considered obscene or otherwise non-permissible in the US. Often paired up with watersports (urination).