Yeah, I can't imagine I'd be a fan of it for gagging my furry mouf. But I did encounter a M/m upload on u2b recently featuring feet duct-taped to a folding chair (which the ler proceeded to CLAMP to the floor with his boot -- such a boss move). The tape was outside the lee's blue jeans (OH! Have they thought of that as a marketing move? hehehe) solidly enough to hold him but loose enough the ler could work his socks off. Easily one of my favorite amateur tickle viddies, which is surprising because you can't see either guy's reaction, which is usually key for me. What you can see, instead, is some of the most effective technique I've encountered, mixed in with a little improv and some trial-and-error. Which almost made it hotter -- it was a newish experience for both of them, and so sweet. ... Oh yeah, duct tape. Seemed both handy and effective in that situation, and I'm so glad the laughter was unmuffled. Woof! 😀