For instance, if you friend was talking about a friend of hers that always wore some pants that looked terrible and then your friend told you, "If I ever wear anything that looks terrible on me, please tell me!"
Would you
1) say OK but never tell her
2) say, "Remember that shirt you had on at the ____ party?" and then make a cringing face
It depends on the person. Some people say they'd want to know, ...but don't really.
Others say they want to know, ...and really want to know.
It completely depends on the person because some people really can't handle the truth.
What really bugs me are people who say they want to know, but don't really.
If you don't want to know, ...keep your mouth shut and don't make me waste my time or hurt your feelings by telling you.