It's fascinating watching the interaction between people that are getting on the train and ones that are already sitting down in it. The minute the sitters spot their potential seat-sharing buddies, as if on cue, their eyes either shoot to the floor, to their phone, to their books - anywhere, but the eyes of the people getting on the train. As if the lack of eye contact is going to stop someone who wants to sit down from sitting down next to them.
You see, the young man that sparked this lesson considered himself a genius. He had occupied the seat next to him with his gym bag and then closed his eyes, pretending to be asleep, so that no one would bother him. Is that not the best idea ever?! ABSOLUTELY NOT!!!
I mean, what the hell gives anyone the right to take up two seats like that? You're absolutely right! Nothing! First of all, a young, healthy man shouldn't be sitting at all. He should be standing up, giving up his seat for those that actually need to sit. There were definitely more seat-qualified passengers on that train. Second of all, if he is just utterly drop dead tired, fine, he can sit his tired ass down, but under no circumstances should he ever occupy the adjacent seat with his bags. Those belong on the floor, or on your lap, buddy.
So there you have lesson #10. Simply put, don't take up two seats with yourself, (if you can help it,) and definitely not with your bags.