The Wolfman came home from work one day in a terrible mood.
"How was your day, Dear?" his wife asked.
The Wolfman growled and shouted, "Can't I even get in the house before you start badgering me?"
His wife said, 'You must be hungry, dear. Why not sit down and have some supper?'
"No!" shouted the lycanthrope, "just leave me alone and let me do my thing, and quit trying to shove food down my gullet."
He proceeded to stomp around the house, tossing stuff around when the wife looked out the window and noticed a full moon.
"Oh, that explains it," she said to herself, "it must be that time of the month!"