Complimenting others is a lubricant in the process of interpersonal communication, but how to show your sincerity is a technical job. Because many times, we want to express our compliments sincerely, but because of our stupid mouth, the true emotions cannot be conveyed. FFC is a great way to praise. Through the form of F (Feeling) + F (Fact) + C (Compare), your sincerity can be conveyed as much as possible.
Yups because our mouth is the window of our personality .
Like the Jokes in any sense is 60% truth and 40% lies meaning most of our jokes towards others are true we just can't express in right manner that is why we present as joking but deep inside it is indeed true.