alcohol tickle
Echo Shadowtickler.
Ethanol (the active ingredient in dirnking alcohol)will loosen your inhibitions and affect a lot of what neuroscientists call "frontal lobe function" - that is the social graces and polishing you developed over your life. These are such thing as normal inhibitions like not saying "that dress looks awful on you", or hitting on people aggressively and inappropriately, and urinating on yourself. You have all seen drunk people and you have all seen drunk people do these things - their frontal lobes (of their brains) are not functioning properly. So you remove these inhibitions and those psycholgical defense walls against being tickled silly like some sort of kid come crumbling down, make sense?
Now keep in mind that more is not better, it's like playing golf - one or two beers and you swing better, a few too many and you don't know which end of the club to hold on to. Ethanol is an excellent anaesthetic (ie it takes away pain) so too much and your lee won't feel a thing. Remember tickling is carried along the same nerve fibers as pain - they cannot feel pain, you're tickling in vain! In fact until the 1850s and the discovery and use of ether, whiskey was the anesthetic of choice for most surgeons! (ouch).
Bottom line: a little can loosen in inhibitions and too much can blow the whole thing.
Cordially yours,
Professor Tickle