RELATIONSHIP : WHAT IS A " Kiss " ?

In Maths :- " Kiss is the shortest distance
between 2 Lips "
___________________________
In Biology :- " Kiss is just exchange of germs
from one mouth to another"
___________________________
In Chemistry :- " Kiss is a process of testing the
PH of the lips "
____________________________
In Physics :- " It's a process of charging a
human
body "
___________________________
In Computer :- " Kiss is a local area network in
which 2 bodies are connected without a data
cable "
____________________________ In Economics :- "
Kiss is a process in which
Demand is higher than Supply "
_____________________________
In English:- "Kiss is a touch or caress with the
lips
ACCORDING TO YOU, WHICH SUBJECT DEFINED
IT BEST