Let me start by saying that I was never turned on by guys or thought myself to be bi until my early 20's. I had a smoking hot 18 yr old gf blonde hair, 125 lbs smoking hot body and wild! I wanted what most guys wanted, an fmf threesome. She agreed on one condition, I gave her an mfm threesome as well. I agreed, thought fair is fair. Well a few weeks later she invitied a friend over and my fmf fantasy was finally happening, but thats not the story I came here to tell. It was a few weeks after that when I held up my end of the deal and we meet a guy at his place. Now, I was extremely nervous and didn't know how this would go or how I would feel. But we had a signal that she was to make to me if she wanted to go thru with it. But the three of us are sitting on his couch making small talk when I see the signal and say, well if you want to kiss her, go ahead. He didn't hesitate and moved right in. I sat there and watched a complete stranger making out with my gf and I was getting aroused. I started to rub my hand on her thigh and stomach and pull her shirt off. He stopped only long enough to remove the shirt and started back in. After I removed her bra he slid down and started sucking on her nipple and I started to kiss her. He then moved down her stomach and pulled her pants down. He then started eating her juicy pussy and as she moaned I was rock hard! She then said "Boys, why am I the only one naked?" I didn't hesitate and pulled my pants off and she started sucking on my rock hard cock. He kept sucking on her and wow let me tell you, she is a great cock sucker but that was the best BJ I've ever had. After a few mins she stopped and turned her attention to his now exposed cock and I watched my gf blow him. I couldn't help but wonder what it was like, and found my myself aroused looking at his cock. After a few mins I suggested, maybe he should fuck her. She agreed and moved to her back and I watched him stick his hard cock into her pussy. I moved over and she started sucking on me again. After a few mins he pulled out and lay on his back, she turned over and started sucking his cock again as it was my turn. I entered her doggy style and got a great view of her sucking him. I couldn't hold it anymore and let out a huge load. She then jumped on his cock and rode him until he also put a huge load into her. We all kind of laid there for a few mins and then we cleaned up. She kissed him goodbye and we left. I couldn't help but wonder what it would be like if all three of us would touch and fuck anyone and everyone, but that was the most amazing night I've ever had. Untill....