Special masagge about kiss

Question:- 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:??

Arshad Sahil