Kissing is good for teeth. The anticipation of a kiss increases the flow of saliva to the mouth, giving the teeth a plaque-dispersing bath.
First on screen kiss
The first on screen kiss was shot in 1896 by the Edison Company. Titled The May Irwin-John C. Rice Kiss, the film was 30 seconds long and consisted entirely of a man and a woman kissing close up.
The first on-screen kiss between two members of the same sex was in Cecil B. DeMille's 1922 Manslaughter.
More Kiss Facts
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.