I've always had this problem too! Girls in general just seem rather boring to me, and many are quite annoying. They talk and talk and talk and talk and never shut up. I'm quiet by nature, and I just don't see the point of yapping about anything and everything. Plus, about 99% of the time it's a conversation about shoes/clothes/other girly things I don't care about.
I don't get the purse thing either! My sister has a huge purse that she has to lug around everywhere she goes. It's got all kinds of ridiculous stuff in it. For me, I can carry everything I need in my pockets. Cell phone, driver's license, debit card, and a pocket knife. (Useful for cutting things and I'm not afraid to use it as a weapon.) I can't think of anything else I'd need on a daily basis, although when I need my laptop I carry it in a messenger style case slung across my body. And what's up with girl pants having absolutely useless pockets? They drive me mad!
As far as knives go, I wasn't aware of any laws banning them as long as the blade is 3" or less and it's not a switchblade. (I live in the US.)