Have you thought about using one of your fantasies as a basis for a story? I have not found the name 'gogo' in the library? This particular fantasy does not have the most original plot. But what the heck, your fertile imagination could come up with more unique ingredients.

So far the level of consent is unclear: there is willingness and there are threats. To go the 'unwilling' route, you might want to invent additional pressing reasons for the main character to accept the arrangement. Blackmail could be an interesting option. If you go the route of willingness, there is not much need to pound the submitting character into submission. The outcome might be an enjoyable FM/m tale.

I'm still laughing at the expression 'human pretzel'.