It's rude to be judgmental of the choices of others.
Stacy's friend has gotten a body piercing and asks Stacy what she thinks of it.
Stacy wants to give her friend an opinion on their body piercing.
Stacy tells her friend that she doesn't mind their body piercing and only judges them on their character.
Stacy tells her friend that getting a body piercing was a mistake and that is reflects badly on them.
Stacy's friend is happy that Stacy is open minded about the choices they make.
Stacy's friend is unhappy that Stacy would judge them for getting a body piercing.