Bound for a machine

My girlfriend invites a guy she met in a bar over and starts filming me, and I'm getting turned on with this stranger staring at me naked here. Then the guy gets up and starts spanking my ass, hard. I found out later he left his hand prints on my ass, he hit it so hard. So he's smacking my ass, and Cheryl freaking leaves the room so I am left there with these two guys (only one of whom I knew and the other kind of scared me a bit). I gotta tell you, the whole thing was such a turn on. He hit the machine on and let it fuck me, the the dude takes the camera and starts filming me and then turns the machine on fast. Holy fuck, you have no idea how scared and turned on I was all at the same time. To sum it up, I got off, many times, and thankfully the dude left shortly after the movie was over and never said two words to me. Part of me is thinking I would be scared sh*tless if I ever saw him out on the street alone at night, and part of me thinks I might cum on the spot if I ever did.