I had heard stories about people fucking on the subway but I never stopped to think how that works. I had thought it would be people who already knew each other, either a couple or just two people who arranged to do it. To be on the same train and then have sex there.
But I never thought about how simple and casual it could be. Then I was there on the last train. My car was empty except for him. A guy on a suit, wearing glasses and a backpack, who entered and sat right in front of me.
He looked at me during a while, checking me out giving me a sexy look. Then I noticed it. He was stroking his cock trough his pants and he looked huge.
He noticed the way I was staring at his cock and nodded while looking at me, then I knew what was happening. The strain stopped at the station and I could feel the tension while we waited to see if someone got in. No one did. And as soon as the doors closed I practically jumped of my seat and got on my knees looking for the zipper of his pants and getting his big cock through the opening with my hands.