I was twelve, staying at my sisters place when her roommate had asked if I had seen porn before. I hadn't, so he put on a porn video and left me alone while he jumped in the shower.
I don't remember the name of the video, but I do remember they had a double penetration scene in it, and the camera was zoomed in on both cocks in the chicks orifices, and I couldn't figure out what the fuck it was. It took the roommate coming back for me to embarrassingly ask what I was seeing.
After that trip to my sisters, the same guy lent me a tape, which I had marked "Robocop" trying to throw my father off if he had found it. Well, after watching it and hearing my dad drive up, I forgot to put the tape away and it sat there all weekend. My dad claims to have never watched it, but I admitted what it was, and then he says he watched it.