Nobody knows when kissing emerged among humans. But the practice of plopping one's mouth on another human, whether in friendship or love, is not universal; which suggests culture, rather than instinct ...

This is the story that YOU wanted to hear us talk about! It received 54 percent of the vote in our Radioactive poll! Dog lovers call them by an array of names: “Kisses,” “smooches,” “licks.” But just ...