Maybe she is not sitting because this is her stop. Maybe the slut is trying to get out but can't because the entrance/exit is not lubed and the doors are stuck. So maybe the message is “a slut can't get off without lube” or 'to let your inner slut out, don't forget to lube the entry and exit points”. Whatever the message is supposed to be, one thing is clear: this is not a “green” company. Sure, the slut is not driving a Hummer, but mass transit is only good for the environment if there are masses transiting…. male or female, if you're a slut, it's better for the planet if YOU stay in one place and let the masses come.