Face and mouth
Strangely, it all begins with the right tilt, 80% of people have the angle of inclination of their head this way when they start kissing.

You communicate and suddenly you feel a sensual explosion!
Lips become 200 times more sensitive than highly sensitive fingertips.
At the same time, your nose dives into the scent of the opposite end, which gives off hidden chemical gravity that can intensify the arousal you are going through.
Quick clicking uses a couple of muscles, but eagerly kissing involves about 24 facial muscles and 100 other muscles of the body as well.

(Violent kissing burns 100 calories).
Your salivary glands start with their own exercises, by pumping more saliva.

During true palpation of the tongue, about nine cubic millimeters of your saliva finds its way into the mouth of the other end (and vice versa).

Butter from the above: This juice is packed with up to 1 billion bacterial cells, but the good news is that 95% of it is harmless.

Blood flow

The kiss can send shock waves that pass through all parts of the body, which increase blood flow to certain areas.

This leads to stiff nipples, dilatation and contraction of the stomach and, in conclusion, tingling of the genitals.

Adrenal glands (adjacent to the kidney)

The adrenal glands unleash adrenaline, giving the signal to start increasing heart rate, breathing heaviness, and palms of the hand.

The brain

Physical excitement may prompt the brain to release dopamine, a neurotransmitter associated with pleasure.

Meanwhile, negative emotions in other parts of the brain are closed.

Also, closing your lip can stimulate your pituitary gland (and the other end’s gland) to release the hormone oxytocin.

It is called a “link hormone,” and at this point you may have already formed an emotional attachment.

The mood

Any kind of these activities can reduce stress and increase happiness.

Associated people who accept the most are, often more likely to have good relationships and will last for a long time.