We always called them "Left-handed Compliments" and I think my Father's side of the family had a genetic predisposition for them. One Aunt in particular used them to produce blunt-force trauma. If someone (it mattered not whether male of female) had put on a little weight she'd say something like "you look pregnant!" How about, "I didn't know they made such an awful shade of lipstick." or " My, that's an unsusal aftershave. Oh, did I tell you I found a dead mouse in the broom closet the other day?" etc. Once I looked at my bare wrist and said "Oh, It's time for me to go." And I went.