I promised that “Makeup on Mondays” would be an occasional feature; sometimes I’ll post every week, sometimes I’ll go awhile before I find something worth posting about. And sometimes, the feature won’t be about makeup at all, but rather some other health or beauty-related product. This beautiful Memorial Day, I’m tackling an odd subject. A subject upon which I’ve been ambivalent for some time. That’s right, I’m bringing up dry shampoo.