...Wait, are you setting people on fire for maximum immersion?
I feel like you're placing a higher standard on one action vs another. I can understand if it makes you uncomfortable because of sex itself, but the immersion reason seems like it doesn't work by itself when you consider other actions you're doing in the game....
You don't need CDs for that, and CDs don't prevent that.
As the other user pointed out, most CDs don't even have a playable form of the game on them anymore. You usually need additional updates to actually play the game (or in the case of those steam installs, the CD doesn't even have a bare minimum on it)
Technically you can own a game as a digital install too, just they won't deliver it that way.
I don't think it really has much to do with DRM. It's practically well known at this point that consoles are easy to pirate through emulation. Especially with the constant day 1 emulation articles