Why does everybody just get to f*** him whenever they won't even without him wanting to?

Who are you talking about ?
If it's the guy with the red ribbon around the eyes, only the dark skin guy has relations with him, and it's consensual although not necessarily a healthy relationship.
If you're talking about the main character (the guy who should be dead but isn't), as of now it has only been a ghost.
So in both cases there aren't several people f***ing him.

The guy with the red ribbon, I think he is an M.