You can't tickle yourself into laughter How come? It seems that the relation between tickling and laughter is *conditioned* in a particular way, and is not a necessary causal relation. It seems that when tickled, people tend to laugh only if they are tickled by someone they like, or if they like the situation. Yet, strikingly, if you tickle yourself, you do not laugh. You can clearly feel the sensation of tickling, but it seems neutral. So how come we can't make ourselves laugh by tickling ourselves, while if someone else tickles us, we tend to laugh?