Right now, there are tiny mites eating, laying eggs, dying, and leaking feces on your face. They're not actually pooping, per se, because of the fact that they the lack anuses:
"They store all of their poop in their abdomens until the day they die, at which point they decompose and leak feces all over your face."
More at the video below, made by Gross Science:
Everything you never wanted to know about the mites that eat, crawl, and have sex on your face.
Animated close-up view of the world at the bottom of the carpet - the world of dust mites.
By the way, you can buy a container of 1,000 live predatory mites here - makes a great gift!
H/T Mental Floss