Male gentoo penguins present tiny pebbles to the females to show affection. With Valentine’s Day upon us, it’s the perfect time to check in on how the animal kingdom is gearing up for the most ...

Kissing feels so tied to human life that it can seem almost impossible to separate from romance, family, grief, ritual, or desire. It sits inside wedding vows and movie endings, in greetings, ...

Cats are incredibly easy to love. We swoon over their cute faces and fluffy waves of fur, and we relish all the ways they show affection—like when they hop into our lap, purring and meowing their way ...

A couple of years ago, while I was at a dog park and having a great time watching dogs play, I heard a young girl screaming to her mom, "Look, look -- Rosie is making out with Henry!" I turned around ...