Okay, I'm going anonymous with this because it's gross AND freakish and I don't want anyone to not like me anymore. (Oops, that's delving a little into the psychological thing, isn't it?)

Anyway, I have a skin thing (like eczema) behind my left ear that causes my scalp to get really red and flaky; when I'm nervous, or if I'm bored, or if I can't sleep, I pick off the little flakes of skin. It embarrasses me to no end if anyone ever catches me doing it, but I can't seem to stop.

And that was definitely TMI, wasn't it? Sorry if I've spoiled your lunch.