I am 5'11, blonde, long hair, average build. Last week I was in a party and bumped into a friend of my ex, who is the same age as her (20), thinner and shorter than me. We talked a bit, mostly about the times I was still dating her and we used to take him with us to parties. We were both drunk, and as the conversation went on, he unexpectedly said he wanted to bang me, even though he knew I was straight and never did that before. I always suspected he was always with us because he wanted to bang my ex, so I was surprised. I told him the truth, that I had to respectfully decline as I was not into men, ever. He insisted saying it would only hurt a bit. I just laughed at him, and he didn't talk about it for the rest of the night.
I confess, though, when I got home and remembered what he said, I got horny beyond recognition. I had to masturbate at least 5 times before I could sleep, always with images of me in a total submissive role, having him ramming his dick inside my mouth and ass. I have never had any kind of doubt about my sexual orientation, nor any feeling for any guy, and have been happy with many girls before. So this left me really confused. Unfortunately I will have keep this fiery desire to let him cum inside me all to myself until it dies, since we belong to the same social circle and I don't trust he will keep secret about this.