The Platinum Rule far predates the How I Met Your Mother episode of the same name. It is similar to the Golden Rule, but more considerate.
It states "Do unto others as they would have you do unto them, not as you would have them do unto you."
The Golden Rule is to treat others as you want to be treated, but the Platinum Rule understands and accommodates for the fact that not everyone wants to be treated the same way. It says that we should treat people how they want to be treated, regardless of how we might personally want to be treated in similar situations.
The Platinum Rule is a much more empathetic, sensitive moral guideline than its predecessor, the Golden Rule, which ignores the wishes and preferences of the recipients of the behaviour in favor of imposing the giver's preferences onto others in a misguided attempt at kindness.
I like having doors held open for me, but Jane prefers to open her own doors. Instead of insisting that she shut up and let me open her doors, I abide by the Platinum Rule, and I let her open her own doors when she wants to.
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