I had a pretty normal childhood, and loving family, definitely not abused or anything like that. If anything, I was probably too sheltered.
But... there is still a thing...
When my cousins and I got together to play, we used to tie each other up a lot. Nothing sexual of course, especially considering we were 5-10 years old maybe. But playing things like cops and robbers, damsels being kidnapped by pirates, captured super heroes, that kind of thing. And I'm not talking like plastic toy handcuffs either.
Our usual play area was my grandparents' basement. And if you've ever seen the tv show Hoarders, that's exactly what that basement was like. And of course, we peaked in all the boxes and stuff, hoping to find cool things to play with. So we always found new things, and new ways to tie each other up in our games, using belts, luggage straps, the luggage itself, lol. We actually got pretty strict with our tying.
For me, bondage, control... it was fun long before it was ever sexual. I'm still amazed our parents even let us play down there, unsupervised for hours on end. I don't think they ever knew exactly what we were doing most of the time. And now that I know more about bondage safety, I'm amazed that we never seriously hurt ourselves.