I told a longtime acq/friend yesterday, with some heat, that someone else in my life is an "expert demoralizer", and she laughed the hardest I've ever seen her laugh. I finally realized, after knowing her for so long, that the reason I've always felt somewhat off-kilter and uncomfortable around her is that she is like an old friend whom I called (not to her face, but with [some] affection) "Crazy-[her first name]", as she seemed completely normal (other than being very abnormally smart - she was able to osmose shocking amounts of information while mostly asleep, staring off into space, high, etc.) but was (wait for it) crazy, in that you would say something and everyone else would laugh but she would just stare back at you stonefaced (or even looking offended) and then change the subject, but then someone would say something sad, gruesome or otherwise (just believe me) very unfunny, and she would cackle and tumble about as we watched silently and exchanged perplexed, uneasy glances. Our mutual friend J. once said, "She is SO pretty, but I just know one day I will wake up and the last thing I will ever see is her standing over my bed with a hatchet." Hm: I am making her sound like a psychopath, but that's what was so odd - as I say, she didn't OTHERWISE seem crazy. This person who thought "expert demoralizer" was so hilarious is not that crazy, but we do have such drastically different senses of humor that it's a relational liability - it's as though I only speak Franglish and she only speaks Spanglish. Makes me recognize in what large part humor comprises interactions.