If the amount of information obtained from the other person's words is "1," then the amount of information obtained from saliva is as much as "200 million." It is said that people feel comfortable with the scent of someone who has a different immune system (MHC gene) from themselves, and the possibility of leaving healthier offspring increases. Kissing is also a place for exchanging scent information, and people instinctively choose their partner. By having every part of the body licked and being enveloped in saliva, large amounts of "happiness hormones" such as endorphins and serotonin are secreted in the brain, and there is also a theory that it makes you 5 years younger. If I've told you this much, you'll understand. Drowning in saliva, enveloped by the woman's mucous membranes with a French kiss, and finally reaching the peak of pleasure with a handjob... There is absolutely no greater happiness than this. Of course.