If you complete the game, then the bondage animations will show up on the character customization screen along with the other ones, which is probably the closest thing to what you're looking for.
Otherwise, there's currently no way to remain bound/become bound on command. That shouldn't be too hard to change though if you wanted to download the source from Github and tweak a few things, though.
That shouldn't be too hard, levels are all in plain text and the code for loading them in should tell you what everything does. I had made a level creator app in C# at one point, but I think that's been lost to hard drive changes. ^-^"
