Please do not make assumptions based purely on my age, about whether I should be sitting in certain seats on the bus.
I broke my knee as a teenager, but didn't have it treated. Several hard falls since have aggravated it. As such, I find it extremely uncomfortable to sit in seats with insufficient leg room, where I have no choice but to keep my knee bent at 90 degrees or more (even for a short amount of time), and especially in situations where my knee is pressed up against a surface such as a wall, barrier, or the seat in front. (I also have problems kneeling.)
Generally, I'm fine in daily life. I can walk fine, take the stairs, do all the normal stuff. Standing on public transport is just fine, too. And I do
generally try to ensure I'm not taking up a seat someone else obviously needs, and will readily give up my seat for obviously pregnant/elderly/disabled people without being asked/prompted. If your need for the seat isn't obvious/visible, all you need do is ask.
But if I'm sitting in one of the "priority" seats, it's generally for the legroom, so as not to aggravate my knee. Not because I'm being an obnoxious, inconsiderate youth.
Also, please do not assume I am the font of all technological knowledge on account of being in my twenties.
Yes, in some cases I do know how to use that function on the PC, and will happily show you how. However, if you want to know how to use your new iPad/iPhone, you're better off asking our IT guy, who will gladly play around on your new toy to show you how it works.