How do I start the “friends with benefits” conversation?

Alright so there’s this guy and to keep it short, I really wanna fuck him. He’s the only guy who has have truly turned me on and gotten me going, and I know he feels the same way about me, so I wanted to ask him about a fwb type of relationship because I know he can’t really date right now (it’s a long story, trust me), but I don’t know how to start that conversation.

Any tips?