Friend of mine who use to work at the ER overnight said there was a couple that had came in and the boyfriend was trying to claw his ear off. He already knew what it was. A cockroach was in his ear and couldn't get out. Apparently it's one of the worse pains to deal with because of the hair on their legs rubbing inside your ear.
Cockroaches are nocturnalHer activities continue when the human is sleeping tooThe human doesn't know what the cockroach is doing while they are asleep