Marry your best friend. How many times have you heard that? Quite often, I suppose, but are people really best friends with their spouses? "If I married my best friend, I would be tagged as a lesbian.

Dear Annie: I am divorced with two teenage children. I caught my ex-wife having sex with her best friend’s husband (“Cris”). My wife and I had a long-standing friendship with this other couple, ...

I hoped it would end. It hasn’t. By Kwame Anthony Appiah Kwame Anthony Appiah has been the The New York Times Magazine’s Ethicist columnist since 2015 and teaches philosophy at N.Y.U. My best friend ...

Expecting a spouse to be both friend and lover is a relatively new concept. Some think it’s asking too much. By Catherine Pearson Stephanie Lopez is effusive about her husband’s good qualities. He is ...