I say "Oh God" when I have sex

Actually I used to feel guilt for it, to get over it though I just had to keep pointing my finger at the sky and saying "Fuck you god, you utter fucking bastard" and stuff like that. The way to get over it is to address what you fear.
Cheers for making me think about you having sex

But Yeah. It's funny that Muslims actually have to invoke Allah while doing it by saying 'Bismillah.' I think it would make it pretty awkward to be doing it and all the while knowing that Allah's watching you.