Hilarious. Nice of you to teach him how to break it down. As tyr mentioned, learning respect for firearms, including proper maintenance, how to clear a jam etc, is as much a part of firearm handling as which end the bullet comes out. I suppose we should add put your beer down before checking on a jam. I'm a fan of two hands on the gun while in the act of shooting; ie weaver stance. Also, while the rules in the op may be helpful to some, but I've always favored the four rules taught by jeff cooper; mostly because they're easy to remember. (I may paraphrase them)
1) treat every firearm as if its loaded;
2) don't point it at something you're not willing to kill or destroy;
3) keep your finger off the trigger until you're ready to fire;
4) know your target and beyond.
And of course, don't spill beer in the action-- it's not good for the gun and, as tyr pointed out, its a waste of beer.
If you feeling curious, google Jeff cooper-- he pretty much wrote the book on many aspects of pistol handling and techniques of an armed confrontation, focusing on the necessary mental preparedness utilizing color codes. Man had some great quotes too; for example, "no more than five to ten people in a hundred who die by gunfire in Los Angeles are any loss to society. These people fight small wars amongst themselves. It would seem a valid social service to keep them well-supplied with ammunition."