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: 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 ...

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, ...

President Trump on Friday threatened to “reciprocate” travel warnings issued against the U.S. following a pair of mass shootings. Asked about his reactions to the travel advisories, Trump replied, ...