Proof that girls are evil

Now I know what Mathematicians do all day. This is what I received today.

First we state that girls require time and money:

Girls = Time x Money

As we all know “time is money”:

Time = Money

Therefor:

Girls = Money x Money = (Money) ^ 2

And because “money is the root of all evil”:

Money = Squareroot(Evil)

Therefor:

Girls = ( Squareroot(Evil) ) ^ 2

And we are forced to conclude that:

Girls = Evil

;)