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?