I'm a mostly straight guy but fantasize about sex men sometimes. I have a girlfriend I live with. The sex has been pretty infrequent so today I had a man from Craigslist come over to jack off and watch porn with me. He was much older, like later 50's. I'm early 40's, fit and clean. I've never done this kind of thing before and only been with another man once, very briefly. I was just so fucking horny, you know?? I was so nervous but then he seemed more nervous than me. We started watching tranny porn and jacking off. His cock was good sized like mine and that turned me on. We started jacking each other off more and watching the tranny suck a guys huge cock. I didn't want to do oral for fear of disease but he swore he was clean and married. I let him suck me - he really wanted to. I probably shouldn't have but wow it blew my mind. I had to keep stopping him so I wouldn't cum yet. I really wanted to suck him, so I did. That was fun, I could feel him getting hard in my mouth. I could feel him getting turned on. We sucked each other in different positions then as he was sitting there, I mounted his thigh and out our cocks together. We started jacking them off together and then I couldn't take it anymore and I told him I was going to cum. I came hard on his stomach and cock and then he did too. We thanked each other and then he left. I felt kinda bad after, cheating on my girl like that, but it was also a lot of fun.