Proof to show Women are directly proportional to Money.

money = mone(Y)......eqn 1
women = (W)omen...... eqn 2

Combining eqn 1 and 2, we have

mone(Y) = (W)omen........eqn 3

Collecting the like terms from eqn 3, we have

Y = W

Therefore, if Y equals W, then W = Y (reversible equation).

Then substituting W for Y in eqn 2, we have

women = (W)omen
women = (Y)omen......eqn 4

Rearranging the letters in eqn 4 gives

women = mone(Y), then
Women = moneY........ (QED)

So what truly makes a woman happy is Money.