Another twist on this -- usually you don't know when someone may hear a compliment "the wrong way". An example of this is when someone has an eating disorder such as Anorexia Nervosa and someone compliments them by saying, "ooh, how do you stay so thin?" The disorder twists things around in the individual's mind and somehow it is heard as encouragement to keep going with that, lose just a little more weight to ensure that he or she will remain thin....when perhaps the person is already at an extremely low, possibly even dangerous weight.