Research by John Gottman, a leading relationship researcher, emphasizes the importance of positive interactions in healthy relationships. Warm greetings can be seen as a positive exchange, ...

From those shirking the generally accepted rules of society, to others playing simply destructive pranks, it's difficult not to let out a little smirk when the culprit's own actions backfire.

This is a photo collection curated by AP photo editors.

Three women invited men from Hinge on a triple date for their first Valentine's Day single together. The hilarious result went viral, amassing more than 15 million views.