So my new girlfriend and I have "Pornosex". We have sex, with each other, while watching the video. I do have to take special precautions, while watching my ex-girlfriend's video, however, to prevent sibsex. When I watch I close one eye, and only look at the 1/2 of the screen that has my ex-girlfriend on it. My girlfriend, even though she wouldn't get sibsex, of course, doesn't want to watch my ex, so she closes her other eye and watches the other 1/2 of the screen with my brother on it. Works great for us!!!