If they are anywhere outside of the bedroom, Thor will always just be THERE. Watching. And eating something.
Lover’s spat in kitchen? Eating cereal and watching at the table.
Fucking in the workshop? Sitting on the steps, eating a mutton leg.
In the hospital because Tony’s done something to wind up there again? Sitting in the room, eating Tony’s hospital jello.
Having a lovely stroll in the park? He will be there, following them and eating an ice cream.
I don’t know why, it just seems funny. Besides, it’s not like Thor really has anything else to do since movieverse Thor isn’t really Dr. Donald Blake.