suspected

I've known several people who, in my opinion, liked to tickle people a little more than average (not that that's a bad thing). Has anyone ever suspected anyone they knew to be one of us?

Has anyone here ever suspected that a family member of theirs has a tickling fetish, interest, or infatuation on any level? If so, have you ever talked to them about it or called them out about it? I expand the question to include friends, but only if you've ever asked them about it directly.