At the University College of London, Sarah-Jayne Blakemore made use of MRI to discover why we can’t tickle ourselves. The cerebellum figures out the results of our movements and tells the brain to ignore the self-tickling. Test subjects also used a machine to tickle themselves with a slight delay. That did produce tickling. The Yahoo news article ends with this statement from Blakemore: “So it is possible to tickle yourself, but only by using robots.” Will someone file a patent?