Rotifer larva stick to anything when released into environment...I know I've exhaled hairballs before with a tiny larva in middle. I have also watched a larva, under microscope, twist around a hair, causing it to twist...eventually more hairs get involved and you have a classic white/red/blue tiny hairball as in many pics seen around here.
I suspect that these tiny hairballs (which are like a mobile nest for a baby rotifer) become electrically charged from all of the twisting, which is what makes them almost magnetically fly to any warm-blooded life-form, but this is speculation.