Dear Ann Cannon • My wife of nearly three decades is very, very sensitive to criticism, so I’ve learned that to keep our marriage blissful it’s best not to point out any of her (few) undesirable qualities. However, she has developed really bad breath recently. I don’t know why, because she brushes her teeth often, flosses, uses mouthwash, etc. I think she needs to see a doctor or dentist about it. How can I tell her without hurting her feelings?