"It has been observed at least since the time of Aristotle that people cannot tickle themselves, but the reason remains elusive. Two sorts of explanations have been suggested. The interpersonal ...

“Solo tickle is even emptier than solo sex,” psychologist Robert Provine once wrote. After all, “you can masturbate to climax, but you cannot tickle yourself.” Why is tickling an activity reserved for ...

WELSH scientists are using a tickling machine to help them crack the secrets of a good night's sleep. WELSH scientists are using a tickling machine to help them crack the secrets of a good night's ...