from here but with a little twist of my own

Proof that Guys are Evil

(Dan's note: I don't take responsibility for any sexist overtones here)

First we state that guys require time and money

Guys = Time * Money
And we all know that "time is money"
Time = Money
Therefore

Guys = Money * Money = (Money)^2

And because "money is the root of all evil"

Money = (Evil)

Therefore

Guys = (Evil)^2

And we are forced to conclude that

Guys = Evil

Ha!