From reddit: I taped my wife and I having sex secretly, including a close-up, and have been using it for masturbation
"My wife is not great in bed, and we have sex very seldom. I masturbate a lot to keep myself "under control".
I hid a camera from the vagina end view, and one at the head of our bed, and had a GoPro with sound turned off under the covers.
While giving her oral, I slid the GoPro over and held it close obscured while I gave her cunnilingus and anali..."