there are people here who will tell you that it's "creepy" for you to tickle a girl who doesn't know about your fetish.
It's not creepy to tickle a girl who doesn't know about your fetish. What is creepy is deliberately lying, tricking people, or engineering situations to tickle people who would otherwise refuse if they knew what they were actually getting into.
Tickling your date without telling her you have a fetish? Knock yourself out. Dressing up as a travelling podiatrist and offering free Babinski tests that you're videotaping for "research" and posting the results on YouTube? Creepy.