If you have ever had surgery, you probably have had the weird experience of signing off on a bunch of medical paperwork. The oddest form is the one that gives the surgeon permission to assault you. Think about it. Usually we don’t want people poking at us with knives. Doctors can’t do that either, unless we give our permission. Otherwise, every tonsillectomy would lead to a 911 call.
That means context matters. Stick a knife in someone in an OR and that is cool, do the same thing down at the local tap and you'll do 5-7 in the state penitentiary.