The first time it was done to me, I didn't realize what she was doing, kinda climbing her way down me like that, until I felt the nails on my feet. Before I could finish something like, "What are you...," I was gone. She tickled my feet, my underarms, and licked my nipples all at the same time. Sometime during this, she let me enter her and continued the treatment, forcing me into some explosive orgasmic firestorm. I couldn't even walk well for a few minutes after that. Now, I do it when I can. It takes coordination, and when you're goin' hot and heavy, it's hard to concentrate there. But the upperbody tickling with the random strokes on her soles gives them no mercy, and they'll flip.
Hotel, I can think of something special for you.