I'm just gonna float the opposite idea; being (almost stupidly) blunt about your intentions can also yield results. Historically TMF has always encouraged subtly or in some cases not attempting at all, but rather than mask your intentions, go the opposite direction. You like tickling, you have a weird idea you think might be fun and look, a neat prize! Wanna try? Everyone knows fetish shit has the potential to be creepy and humiliating. But not only does that rarely actually turn out to be so, sometimes being upfront with 0 finesse can also work.
Look at this;
That there is a woman who, while I was friendly with years before, I was never particularly close to and up until then I hadn't spoken with more than casual "Hey what's up?"s and facebook likes for years. I had a thing I liked to do and a guess she would probably go for it. I just told her the plan; I do tickle stuff, it's fun and everyone I've done it with before has liked it. Want to try? They might ask if it's a fetish. Tell them it is. At least partly. Do not lie. Do not pretend it's just some
cah-RAZY! or zany spur of the moment, never gave it too much deliberation thing you thought might be funny. You like tickling, you've had fun with it with people before, you figured you'd try it now.
If they're creeped? That happens. Play it off. "Oh ok then". No "Oh christ oh god I'm so sorry..." or poor attempts to act like you just wanted to gauge their reaction by doing some freaky shit. Just "Ah ok". You asked them to try something different, they said no, end of story. Here's another example where I bombed;
Note that in no way at all is she interested. Also note that her reaction was just "lolno", and not the dreaded "Tickling? Fucking
TICKLING?!?! What the everliving fuck is wrong with you were you
TICKLE people?!" reaction people around here fear so bad. She just didn't wanna, I dropped it, shit proceeded like normal.
Always keep in mind it
could get very awkward. It just probably
won't, and what's more, maybe you'll actually end up pulling it off.