My father has it too, so I’m told. He is not a vengeful man, and is in many ways quite charming. As long as you’re not on vacation together, couped up in close quarters for long stretches of time. With an itinerary. HIS itinerary.
Me, I’m delightful all the time. Except when I have mood swings, or become intensely and irrationally afraid for reasons that I cannot explain to anybody. God help the person who has to deal with me then. Oh, hi Spazmo!