Lips are 100 times more sensitive than the tips of the fingers. Not even genitals have as much sensitivity as lips.
Approximately two-thirds of people tip their head to the right when they kiss.
The term “French kiss” came into the English language around 1923 as a slur on the French culture which was thought to be overly concerned with sex. French kissing involves all 34 muscles in the face.
Mechanically speaking, kissing is almost identical to suckling. Some scholars speculate that the way a person kisses may reflect whether he or she was breastfed or bottle fed.
Kissing may have originated when mothers orally passed chewed solid food to their infants. Another theory suggests kissing evolved from prospective mates sniffing each other’s pheromones for biological compatibility.
The first on-screen kiss was shot in 1896 by the Edison Company.
Kissing played an important role in ancient Greco-Roman culture and was seen as a sign of respect, thanks, reunion, and agreement, as well as a rite of inclusion.
The mouth is full of bacteria. When two people kiss, they exchange between 10 million and 1 billion bacteria.
“X”s at the end of a correspondence letter represent the contact of the lips during a kiss.
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