For example if you have a friend that's a cheater and your partner cheats on you. They are quick to tell you some good advice on how you shouldn't put up with it. They recognize that it's wrong especially if it happens to someone close to them. They give the best and truest advice Lol.
Most Helpful Guy
Because they know more than anyone that you can't change a cheater. They cheat for reasons that you can never change, whether it be your looks or their mind.0