My FIL can be a bit of a bully at times. He teases, but then he takes it too far and starts to really hurt people. 3 out of his 4 children recognize that he's just being a jerk and ignore it, but one of his daughters, my SIL, is very sensitive and always starts to cry, react, get hysterical, etc. She's 35 now and she still does this so clearly years of being teased never "toughened her up". She is also now married to a man who bullies and controls her. Good job, FIL, you really did her a big favor. Personally, I will go along with FIL as long as he is being good natured but when he crosses a line, I shut him down immediately and tell him he's being nasty. I see it in my DH at times and it concerns me b/c he doesn't recognize when he's being hurtful. Teasing someone not equipped to handle it is cruel, not to mention the lowest form of humor available. It's just mean, not clever.