'As time goes by' is actually a song written by Herman Hupfield in 1931, and it is better known by a part of its lyrics 'a kiss is just a kiss' made famous by the film Casablanca.
Now, a Kiss Isn’t Just a Kiss
By JAN HOFFMAN
This would be a surprise to most people:
'Justin R. Garcia, an evolutionary biologist at the Kinsey Institute at Indiana University and a scientific adviser to Match.com who was not involved in this research, noted that kissing was so closely associated with emotional connection that sex workers often refuse to kiss their customers, insisting that it is “too intimate.” '
An unwanted kiss can mean a 'kiss of death' politically...
On the other hand, a proper kiss on the hand of the right person, can lead to career advancement...
Can't help being reminded of this old Francoise Hardy's song...