Yes, yes it is…
IN PRISON.
Sorry, couldn’t resist.
Sure it’s a thing. Everything’s a thing, somewhere. I knew a high-end pro-sub who spent a whole summer in ultra bondage, strapped in specially fitted chair, TENS machines keeping her in pain, but also giving her muscles something to do while being milked and occasionally fucked. She had a day off a week though, isn’t that nice.
Personally I think the best thing to do is make it a thing, in your head, and keep it there. Find ways to explore it, strict bondage, impalement etc, but only with someone who really knows what they are doing and you totally trust.
These kind of things are fine as a fantasy but try and mix up even your thought life so you don’t find yourself going down a rabbit hole that is unlikely to end up anywhere good. This is a good example.