Am I Alone On This?

I have found that despite how strong a person is in their self-esteem; I know of one phrase that will immediately turn that pride into insecure putty. I only know this because a friend of mine conducted a little experiment where he said it to random people and we gauged their response. From the results we got, all people have a chink in their armor of self-image. If you don't believe me try this, or think back to a time when it has been said about you. This is a statement that, even if you knew that it wasn't true, would force you to check whether or not it was. This is a statement that, even if you knew it wasn't true, you wouldn't want said in a public place, because you knew people would assume it was true without requiring any proof. Once you find out what the phrase is, think back to a time it has been accused or suspected of you. The worst part about it is I know a lady who actually has the problem, but isn't aware or doesn't care. She seems to be an angry bitter lonely woman. Maybe this is why. I hope people who loosely throw this around, understand its destructive power. It could be potentially life changing. The phrase is, "Your breath stinks." I know. It's rough, but that's just my opinion though, and who the hell am I?