DEAR ERIC: While volunteering at my children’s school another mother asked me, “Why do you wear makeup?” She followed that rude question with, “I think it sends the wrong message.” I was completely flabbergasted and didn’t know how to respond. Somehow, I felt as if she was judging my morality and that my presence was not welcome around the students. How should I have responded? – Left Holding the Makeup Bag DEAR MAKEUP: When I read your letter, I actually said aloud, “Oh, absolutely not.” So, you have my sympathies and my respect for not causing a scene at the school. You could have asked, in …