Sometimes we humans have pissy moods. Call it bitchiness, call it PMS, call it menopause... whatever you call it, don't say it anywhere that we'll hear about it or you're dead.
Hormones, they say, are wonderful things. They cause puberty, menses, hair, boobs, muscles, and procreation. Don't know that I won't miss them when they go away, but I do have to admit -- I write some hellacious plots and death scenes about once a month!
(the evil one)