People on here seem really uptight and are failing to educate.
If someone wants to see my knife, that means someone told them that I carry something or they are observant and saw the pocket clip. First thing I do is make sure we aren't in some highly visible area. I don't need to start trouble because one person wanted to see ( I learned that lesson a long time ago). Once I see that we have a little privacy, next I pull the knife out and begin educating. I tell them about the blade, if it's sharp (and how sharp), where it was made, and why it is something interesting, and I educate them as to how it works (I carry autos fairly often). point out how I'm holding it, how to be safe etc, Then, I open the knife. This usually gets a "wow" of some sort. I then close the knife (and educate on how that happens). I then hand the knife to the person that wanted to see it and gently guide them through the process.
They now know several things they didn't know before.
1. how it works
2. what it is made of
3. they've physically functioned the knife
4. they probably want one (at this point they ALWAYS ask "how much?")
5. they then will close the knife and perhaps open it a few more times, close it as I showed them - and hand it back to me.
6. They know now who makes it and it is probably better than whatever they know about knives already (so you won't hear - "gerber is great" you'll instead hear "I have a gerber that I like (followed often by) ...how good are those?"
It seems that people on here aren't educating enough and then getting mad when someone doesn't know what they know. If someone were to say "let me see your gun" - would you just hand it to them without educating them? (or, would you hand it to them at all??).
I've NEVER had a bad experience giving someone a knife because I make sure I guard my property and educate someone properly. If you are out camping or whatever and your camping partner says "hey, gimme your knife" you should do two things - 1) trust that they are your camping partner and have some basic knowledge 2) verify their use with a quick "what for?" thrown in their direction.
I've been at a range with a friend and heard "hey, let me have your knife" - I asked "what for?" response was "I need to pry this thing loose". My response - oh, hold on I'll get you a shit one that you can beat on a little.
If you educate people about things - you'll find everything goes much smoother. If you don't educate people and assume they know what you know - you'll always be disappointed in their reactions as well as how they handle your property.