You know, the times that I have been priviledged to tickle a lady, I never once had the thought enter my mind, "wow, I hope these feet are clean", lol. I was always just so pleased to get the opportunity to tickle a friend, laugh with them, maybe not as hard as them, and have fun. I used to chase a cousin and another girl around the house, they were barefoot and tickle the foot of the one that I could catch (or the one that let met catch them, didn't realize that then, lol). I doubt I ever worried if those feet were clean or dirty, just ticklish. Odor matters a lot to the person being tickled (self-conscious-I think).
Sock removal is fun cause you get to compare ticklishness with before sock removal and after and the visual thrill, just like moving a blouse or shirt up enough to get to (and see) the tummy and sides. All part of the fun to me.
I can see where it would make a difference where nibbling, licking, etc. are part of the play, but I would suspect that most (in my case, ladies) would have made sure they were prepared for whatever they thought might happen. If it were a random opportunity, I wouldn't think twice. But what do you expect from a hillbilly?
Clean $100 Clean and willing $200 An unexpected tickle/nibble/play time=pricesless