Captain: "You have nothing to worry about. Our only human crewmember is one of the nicest, sweetest humans you will ever meet."
Human: "I found my knives! Now, WHO THE HEY HID THEM FROM ME IN THE FIRST PLACE!?!?" -- Anon Guest
Rule Eleven: Never go anywhere without a knife. -- Leeroy Jethro Gibbs, historical Terran hero.
Civilisation in general holds certain truths to be self-evident. Such as the ability to make and safely use sharp things as one of the stages inherent in civilisation. Where, exactly, that fits is up to the civilisation. Nevertheless, lots of civilisations recognise that sharp things are very dangerous and should be kept in the hands of professionals.
...and then there's Humans.