Far more than your average expression, this adage is also known as the Golden Rule! It stems from the Bible -- “Do unto others…” -- and while it carries a lovely sentiment, it can be horribly dangerous in its application.
Just because he wants a shot to the nuts doesn't mean we do!
We live in a world filled with perverts, masochists, and degenerates. If everyone went around treating others the same way they wanted to be treated, many people would feel violated and sex crimes would go way up! In other words, the Golden Rule in the hands of an R. Kelly soon becomes the Golden Showers Rule.
And isn’t it rather presumptuous to assume that just because we like to be treated a certain way, that everyone else should too? What is this need to extend our individual preferences to the rest of the world?
For example, some prefer to be treated with complete honesty, while others prefer a bit of sugarcoating. Just because you prefer complete honesty doesn’t mean you should feel justified in telling your boss that her new maroon pantsuit makes her look fat and proves she has less fashion sense than Lady Gaga.
Suggested change: “Treat everyone with respect…unless they give you good reason to do otherwise.”