Psychology Today on Shine

User post: 4 Types Of Infidelity & How Affairs Help Marriage

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Unless you're inclined towards polyamory, extramarital relations are generally frowned upon. Monogamy is accepted and expected; infidelity is harmful. Right? Not so fast, says Michael J. Formica, a Psychology Today blogger. In a post on the "Enlightened Living" blog, Formica makes the case that thinking about cheating—and even stepping out on your sweetie—can potentially help your relationship.

The Ultimate Threat to Single People: You'll Die Alone

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Dr. Bella DePaulo, lays down the truth in her post

Hot and bothered: Life on the B list

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There's a fascinating article in the current issue of Psychology Today—unfortunately unavailable online, about the theory that humans have a romantic A list and a romantic B list—meaning, people will often hold hang onto a person who's not "the one," just in case partner A doesn't work out. It's sort of like nature's backup plan. This includes the ex who may call or e-mail you every few months, even though he's married, the former flame who doesn't mention he's married until you specifically ask him. So... Have you ever been a B-Lister or kept one?

College confessional: How do you define the term "virgin?"

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This week is "Colin Week," in honor of our Yale intern Colin Adamo leaving the nest for the summer. Every day we'll post one of his own ruminations on sex and relationships. Today, he takes issue with Psychology Today's answer to our question, "Why is virginity still defined...

Psychology Today gives us a taste of our own medicine

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We often think we can do a better job at answering tough sex questions than other writers out there, hence our regular feature "Sex Advice Review," in which we obnoxiously critique what we think they got right and wrong (see Worst Booty Call Tips Ever, How to Write a Naughty Email and Am I...