Groping on the tube

I remember being really fondled on a packed London underground train... so freaking horny. I was pressed up against a chunky older guy in a navy pinstripe suit. He was stroking my ass and using his thumb to push hard at my bumhole through my jeans. Without turning around, I reached back and searched for his crotch. He had a hard-on like a broom handle under his loose-fitting trousers. I squeezed his cock, playing with the end through the sexy material of his suit. When I moved my hand down to gently squeezed his heavy hanging balls, he groaned so loud that people turned their heads to look at him. Luckily my hands were out of sight, hidden by our tightly packed bodies and he just looked embarrassedly at the carriage ceiling. I think he may have actually cum, because, I could feel some dampness in the front of his trousers and at the next stop, he jumped off the train.