Why can't you tickle yourself? Learn more about the process in the brain that prevents it from happening.

Tell a silly joke, sneeze at a rather inopportune moment, remember something that embarrassed a good friend, forget which suit is trump in the card game you’re playing…there are a thousand and one ...

If you’re ticklish, you know that strange mix of pleasure, surprise, and weirdness when someone finds your ticklish spots. But have you noticed that some people aren’t ticklish? And some people enjoy ...