Just stumbled over this web page last night and is relevant to this thread and discussion. 14 things your lifeguard might not tell you. When I was at the pool this morning, I was thinking about the article and made me much more aware of what the lifeguards were doing...and not doing.
_________________________
Earth and sky, woods and fields, lakes and rivers, the mountain and the sea, are excellent schoolmasters, and teach some of us more than we can ever learn from books.

John Lubbock