"The case against tickling is a strong one," writes Jenny Marder at NYT Parenting. Just because kids are laughing when being tickled doesn't mean they enjoy it. In fact, reflexive laughter can ...

Don’t try this at home, but tickling a gorilla, orangutan, bonobo or chimp can inspire bursts of grunting sounds. Yes, that’s laughter, says Marina Davila Ross of the University of Portsmouth in ...

Remember having knock-down-drag-out tickle fights as a kid? At the time, they seemed like a normal part of play. But for most adults, the thought of being tickled is annoying at best. And yet, it’s ...