It sounds to me he thinks if he can get you back into bed then everything will be “fixed”.
If you are willing to do everything else but have sex then I can see why he may think that. I am not faulting you here, I am just making an observation from his sick point of view. Sex is the last stumbling block to get back into the relationship.
I don’t think this is normal guy behavior. Even younger men would get the hint that at some point their childish sexual innuendoes are not working or appreciated.
Maybe it is time to stop ignoring his comments and tell him that you no longer want to play the sex cat and mouse game.