Things Sid doesn't understand

There's a lot of things I don't understand, not because I'm stupid (I do like to think I'm smart...) but there are just these things I don't understand.
The other day I was walking from school with Sille, we walked behind a group of girls all wearing Uggs. I have never understood Uggs, and in case you are not aware of what Uggs are here's a picture:
ok, why do you think they're named "Uggs"?! Here's a hint: because they're UGLY, they're are not good for walking in, if they get dirty (and they do!) they'll never look clean again... I simply don't understand these shoes, why are they created?! Why do people wear them?!
But Uggs aren't the only thing I don't understand, another thing is when people wear headphones and listen to music so loud that other people can hear the music just as well as if the person wearing headphones wasn't wearing headphones. I myself am one of those people who worry all the time when I am in public, I worry that I turn my music up to far, I worry about annoying people when I talk on the phone, yeah all that stuff, you know?
Another thing I don't understand is teachers who don't like children/young people, what are you doing in a school if you don't like the people you're supposed to teach stuff? Don't get me wrong, I like going to school, actually I love it most of the time. But why would you want a job working with people you don't like? I myself have considered becoming a teacher, but I'm ok with working with people... I've had teachers I always felt like hated my classmates and I... Anywaaaays.... that's all from me this week...