The encounter with the Gopnik on the train doesn't make any sense. Because you get to your destination and get off the train with him to have sex. But once you've had sex with him, you then get back on the next train, and continue to your destination. But if you'd already reached your destination, why would you need to do that?
Also, why does he ask for your number and suggest that he'll be in touch, when that never happens?
Usually, I tell this extremely irritating guy to get lost. But there are times when I have low willpower, and I have no choice but to put up with him.