Good for teeth

The Romans created three categories of kissing:
(1) Osculum, a kiss on the cheek.
(2) Basium, a kiss on the lips.
(3) Savolium, a deep kiss.

The Four Vedic Sanskrit texts (1500 B.C.) contain the the first mention of a kiss in writing.

The Kama (desire) Sutra (type of verse) lists over 30 types of kisses, such as "fighting of the tongue".