I hope you've had second thoughts about having a convo with him op. I hope you're listening to the advice you've got here.
What do you expect to achieve with a conversation with someone who has attacked you several times in your sleep? Who enjoys the memory of it and asks for your knickers in order to get off?
Even if he apologised and seemed genuine (although thats not possible now) and never attacked you again,can you honestly say you'd ever be comfortable sleeping in the same house as him again? And that, the hurt and anger at what he has done to you, would ever allow you to feel comfortable in his presence? Or the fear, safe?
This marriage is over.
And this man is dangerous so you need to get out safely. Do not alert him that you are planning to leave. If he gets arrested, that would help you get away from him safely.
I cant remember if you have kids but- Don't raise kids in a household where their mother has to live as a trapped and broken thing. With her captor. Your children deserve a happy, safe mother. And a rolemodel who removes bad peopl from her life.
Any conversation with him will likely just end up with:
you being made to feel like you are 'overreacting' or 'being unfair' or 'misunderstanding' him. Chances are there will be talk about how if you leave, you are 'breaking the family apart' or 'not willing to fight for us' (ps: heads up- HE broke the family when he assaulted you. And there is no 'us', his actions saw to that).
Maybe there will be a side serving of - DARVO (deny attack, reverse victim with offender). Where he makes out everything is your fault. Or, an abusers personal favorite move, when they Instead of apologising what they did, bring up something you supposedly did wrong to them in the past and shift the conversation onto that.
That's what to expect with a conversation with his sort. Alternatively, he may act sorry and sheepish. But you'll catch something... 'off'. A smirk in the corner of his mouth. Because he's laughing at you. He's laughing at your pain. He's laughing because you think he cares. And that's...hilarious to him. Because he doesn't, and he thinks himself so smart and you, so stupid.
Even if he appears sorry - he will attack you again if you stay.