Dear Amy: We have three sons. They are grown, successful and professional, with equally successful wives. They come to stay with us, use our cars to see their friends, eat what we prepare and never ...

Dear Miss Manners: We live in a small beach community. Five years ago, we met a lovely couple who have a vacation home across the street. We are all semiretired. They are both gourmet chefs and ...

DEAR MISS MANNERS: I’m not well-off, and my friend is. She loves eating at nice restaurants. I can’t afford those, so I usually take her out for hamburgers. She knows my financial circumstances. I am ...

DEAR MISS MANNERS: My friend and I were discussing dating reciprocity, and we both agree that even with “old-fashioned” concepts, things must be reciprocated. The gentleman will pay for dinner the ...

DEAR MISS MANNERS: Our neighbors of over 10 years suddenly and surprisingly invited us to their home for dinner. In all those years, we were casually friendly, but shared nothing more than short ...

DEAR MISS MANNERS: How do you respond to people who never reciprocate? We casually hang out with a very social couple and their only son. Our kids have been friends for eight years. For that long, ...

Reciprocity (give-and-take exchange) is essential for successful human interactions. Feeling motivated to return a favor (and feeling owed for a favor) drives social behavior, personal interaction, ...