Apparently, these are things NOT taught by parents or schools...
On a philosophical note, most of the hard sciences (manual work of one sort or another) is a combination of OJT and talk.
Read a study that said work conversations are one of the best learning tools.
You cant teach it, you have to live it. We really don't live it anymore. That sort of thing came out of farms and such. Ours was a bit different but closer to farm work, fishing is a great teacher as well.
I learned about rings at age 17 when I tried to rip my finger off via a thwart bolt (surveying oddly enough) and a high school ring.
I talked to too many men over the years that had lost or seen lost fingers stripped off by rings (or burned off on crossing hots and or hot and ground)
When I got married I told my wife that I would not wear a wedding ring at work (I have one, I do wear it on vacation etc).
I would go with a woven one, wooden one (reluctant) preferred wold be a tattoo. She grew up on a farm and understood, we just went with trust.
Not that you are going to find much chance for romance in a mechanical room mind you. And if I was interested in that route I would not have gotten married anyway.