...because I sweat in them.
I'm moving materials around and making binders of stuff. It's fine and I don't have to be awake for it. So, that makes me happy. Oops, I wore a sweater to work today and can't even push up the sleeves for comfort. I may end up taking the thing off. No worries, I'm wearing a button-up underneath. It's just wrinkly and not that great-looking.
I definitely won't wear a sweater tomorrow for Charles' class.