Several years ago back before I got a divorce from my first wife, I was doing some welding, tractor & equipment repair, along with vehicles, all after work. Anything I could get in my shop (some jobs was done outside) I could turn a dollar on. Over the years I have acquired several thousands of dollars worth of Snap-On tools. I usually buy most any tool I need, including "special" tools. Seldom do I borrow anything.
I had a couple of friends that had keys to my shop that were great about anything they used or borrowed. One of them got a little careless, I changed the keys and give only one of them a key and from then on, this friend (a very close friend at the least) was never an opportunity. He seldom got anything without asking first.
Some time years back I was under the hood of a truck, actually sitting on the top of the core support pulling a set of heads I think, best friend had stopped by (as always just checking on me) handing tools, BS'ing, just shooting the breeze. There was a car stopped at the end of my drive way, which was about 250' feet long. He walked up to my shop asked to borrow a 3/8" wrench. I crawled out from under the hood to look in my loaner box (cheap tools either given to me or found in old vehicles) for a wrench. He spotted a Snap-On under the hood of the truck about the time I found one and he said there's one. I said I don't loan them, but here's one you can use. He asked what's wrong with using the better one, I said if you don't bring this one back, I haven't lost much. He said hell I'm just at the end of your drive way. I said don't matter you can use this one or I don't have anything else to loan. He took it and I got back under the hood of the truck. A few minutes later I heard the car start then just drive off! Best friend said do you want to run him down, I said no, not a big loss and I'd bet he will never be back here again. Best friend said I see why you were rigged for a pos to give him.
Sorry for the long post, but such dose happen.
I've always heard "Don't load your car or wife to anyone, since some one will throw a Rod in either"!