Friction burn.
And I am a very good sleeper, apart from the fact I can only sleep with a whole tonne of duvet between my knees.
It's fine really, since I've never had the kind of argument or the kind of room temperature that requires you to sleep about a metre apart with enough duvet to cover you, but 'tis only a matter of time before there's an actual cold day in that hellish furnace of a flat and it starts.
Although even then we'd probably just be like COLD ENOUGH FOR CUDDLES YAY.
It's very very warm. I HATE WARM BEDROOMS.