Do you have a hangup that bugs your DH? I don't like having sex in full daylight unless there are plenty of blankets involved. I will, but I am more uninhibited if I feel somewhat covered or in the shadows (my own personal issues with my body).
Is there something that bugs your DH that you want to work on? Or are you pretty much fine with letting him get over it?
windows.... I refuse to do it anywhere if there are open curtains or blinds. My dh will say, no one can see us down here or over here or whatever and I dont care, I will just stop until he gets up and closes the blinds!