Tipping Rule number 6

Rule Number 6: The “why 10-15%” rule: who ever decided that the socially acceptable amount to tip is 10% or 15% in some areas? The tip is in fact coming out of my own pocket and the money that I worked hard to obtain, therefore it is my choice, and mine alone that should decide what I am willing to give as a tip. This is especially annoying in cases where the restaurant always adds a gratuity to your bill.