To be honest, Absinthe is not all that. Its got quite the reputation from films like Eurotrip, but in all honesty it is just stong alcohol (and actually not even close to the strength of some spririts available, expecially from Russia and Poland.) I'd imagine people think its hallucinogenic because they get very pisesd very quickly, which they weren't excpecting, so are just mistaking regular drunkeness for halluncinations. As for drinking and tickling, I probably wouldn't advise it, your senses would be considerably dulled, and hysterical laughing will make you more prone to throwing up. If being tickled whilst hallucinating is your goal, then Absinthe is not the way to go. If you want to open it for a special occasion then birthdays are usually best, ones you don't intend to remember...