You have a pretty...crazy kink. Public . The thrill of being caught. Maybe even a little of bdsm. But either way, it's a thrill you have to satisfy. So you occasionally take a train. But not any train, the last train of the night. Which is where the dirty stuff happens. Raping, killing, things of that nature. But you take that chance, because what could go wrong? Wellll, you almost get killed and a handsome man saves you!