FUN FACT: Recent discoveries show that the skin condition Rosacea is in fact caused by these abyssal demonspawn literally filling your pores up with their shit! :) Because they lack an anus, all their waste stores in that massive tail sack of theirs until death, where it comes spewing out like the infected black humor of a deceased plague victim!
Just try to imagine what horrors would take up residence in your eyebrows/lashes if you could actually purge these gross little shits completely from your body.
I kid, you don't really have to think of it; that would be nature's job, and she'd do it much better than you.