Kissing custom on International Kissing Day
The history of kissing began around 3000 BC, and ancient people kissed the gods when they worshipped them. During the Roman Empire, not only relatives and friends, but also businessmen and passers-by were kissed to show their welcome. In the Middle Ages, this greeting ceremony was not only restricted by interpersonal relationship, but also by social class.
The lower the social status, the farther away the kiss is from the face. Kiss your lips for people who are equal to you, and kiss your hands and knees for people who are taller than you. For people who are insignificant in front of you (the clergy first), kiss the instep or even the ground at your feet. In Italy, a man must marry a girl who kisses in public.