It's like Gibbs' Rule #9: "Don't go anywhere without a knife". Except it's been my Rule #1. Even now, still in the Peoples Republik of Ill-ear-noise I still carry, and not always only one.
Heck if I forget my "legal length" Swiss Army Knife I feel naked even if its a 15 minute run to the store and back. A knife is a tool, like a wrench or screw driver, and doesn't have a secret power that makes you stab people at its will. And the Federal Switchblade Knife Act (Law) is the biggest joke in the US Code - it's never enforced by the Feds. And most suburbs give you a $50 fine plus $25 court cost if caught with one. And natch they keep the knife.
I also collect knives and have ... I don't now how many(1)? And that's the funny part because that's Legal in IL. I can buy as many and the biggest dang knife I want but can't take one out of my house if the blade's longer than 3". [ STOO-PID™ laws]
(1) As the saying goes, 'If you do you don't have enough'.
That's Flycatcher's Rule #9 too.