I was surprised the first time I saw someone transform into a tickle monster. They curled up their fingers and rhythmically poked someone else’s armpits. I asked my friend John Wright about it. He’s a ...

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 ...