How to explain the truth that is often hidden in our jokes?

The truth is often hidden in our jokes. How to explain it?

I think if two people have a good relationship and often hide the truth in jokes, they are not sincere to both sides. If you are sincere, don't hide the truth in your heart, because since you like each other, you must say it. If you tell the truth, the other party will know that you will step forward and get to know each other better. If both sides hide the truth, how will the other know? Everyone will think this is a joke. Don't let this misunderstanding leave you with regret. I hope you can speak your mind, so that you will be happy, comfortable and both sides will get the answer. I don't know if my understanding is correct. This is my suggestion. I hope to adopt.