First of all, you don't know his oral hygiene. Not everyone can brush their teeth in the morning and evening, and not everyone can always pay attention to the health of their teeth. Because of this, our life has become very bad. In fact, there are many kisses in disguise in life. You can guarantee that there is no residue on the chopsticks you are using now. In fact, you think there are too many threats, so pay attention to this problem.

Secondly, you don't know if he has any oral diseases. Like what oral ulcer? This is a very small oral disease. But because of this, we should pay attention. Also, chewing betel nut is popular now, which will lead to oral cancer. Have you noticed? Because of your carelessness, you passed by the disease again and again.

There is also AIDS, although it is not directly contagious, but if you kiss without knowing it, what feelings and thoughts will you have after knowing the result?

There is also whether the other party has respiratory diseases. General respiratory diseases can be transmitted. If you are not careful, you will be infected.