(fecal fetish) during sex, you have your partner be in a certain position where the anus is visible, then you take a pice of paper and roll it up into a tube, then stick it around the anus, then you suck while your mouth is on the other end of the tube and then you get a mouth full of feces.

when you've done something so cringe you can't stop replaying it in your head and it stops you from getting on with your every day life