Saliva contains natural painkillers

Recent scientific research has discovered that human saliva contains natural pain-killing substances, and its efficacy is six times that of morphine. Natural painkillers are rare, so scientists hope that this discovery can be applied to clinical studies in the future. The great advantage of natural painkillers is that they have no side effects. On the other hand, using some synthetic drugs like morphine may produce unexpected side effects that could potentially impact human life.

This discovery was initially made during research on rats, so scientists tried to find similar components in human saliva, and their hypothesis was confirmed. Now, it seems we are faced with a very interesting question: kissing not only brings psychological pleasure, but it might also have significant medical functions. If one day you have a headache or some other pain, you might as well kiss your loved one; the exchange of saliva will relieve your pain just like taking morphine, making the pain disappear instantly. Now, when you talk about this, it's no longer just a joke.