Why a female tear is the most expensive one ?

There is nothing more expensive than a female
tear.....
When a single drop comes out,it first mixes with "loreal"
eyeliner and "Dior" mascara ;)
then when it comes down to cheek....
it mixes with D&G blusher :)
. .
and in case it touches the lips,,
it gets mixed with "Maybelline" lipstick
this means that a single drop is worth atleast Rs.1500 :D :P