the.com/tickle
the only sensation that makes you laugh while begging it to stop
self-proofyou can't tickle yourself; the brain predicts it away
two typeslight knismesis itches, rough gargalesis makes you laugh
old tortureused as punishment in ancient Rome and China
rat gigglesrats laugh ultrasonically when tickled by humans
not joylaughter here is reflex, not actual amusement