We were on the subway and it was packed so I was hanging onto my bfs arm when I felt something poke my butt. I turned around and saw an older man who ducked his head quickly and muttered an apology so I didn’t think anything of it but then when we got to the next stop he “lost balance” and leaned his entire body into me while grabbing my hips and I swear he pulled my ass towards his dick. My bf didn’t notice or care cause he was on his phone and the guy just said sorry again and straightened up. Idk why but it felt so hot and naughty to have someone touch me like that when I’m literally right next to my bf but it got me going. I just said fuck it to myself and backed up until I bumped into the guy again and let my ass just rest on his lap to see if he really wanted it. He absolutely did and pushed into me and I could feel his hard on through his pants. I did the best I could to grind on him without anyone noticing and I could hear him groaning behind me. He lasted two stops before I felt him cum in his pants. His cock was pressed against my ass and I could feel him pumping and pulsing and ugh it was so damn hot. Once we got to our stop I reached back and patted his leg and left with my bf. 10/10 experience would recommend.