For some reason, I'm quite open about having a foot fetish, but only my brother and my wife know about the tickling thing. Though they kinda lump the two together, which I guess is easy to do in my case as the feet are my only area of interest when it comes to tickling. I can't imagine telling someone else about my tickling fetish unless the foot fetish thing came up first. Most of my experiences revealing my foot fetish have been pretty positive.