"Miss Manners: Gray hair or mean personality - the reason behind losing a friend"

A reader shares their experience of being dumped by a friend because they refused to dye their hair, while the friend continued to pretend to be younger. Miss Manners finds this behavior silly and praises the acceptance of aging gracefully. In another question, Miss Manners advises discreetly swiping lipstick residue off cups and glasses after dining out. Lastly, Miss Manners clarifies that as a roommate, the reader is not responsible for entertaining guests they didn't invite, but reminds them that couples are joint hosts and should act accordingly.