He said that in his second sentence. In the first, I took it that it was "sleeping with your face turned toward me" that was horrible, for a reason ungiven. Maybe his/her breath smells.That's what the man said.
In what situation do you plan to say this to someone, tufguy?
What were you practising? How to be rude to someone? Unlikely things to say when sharing a bed with someone?
Here's a suggestion - if you don't have a need to say something in your own language, it's unlikely you're going to need to say it in English.
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