Equation!

Although not very rational, here is a better analogy !

Man = eat + sleep + earn money
Donkey = eat + sleep
Therefore, Man = Donkey + earn money
Man - earn money = Donkey ----------------------(1)
In other words,
Man who doesn't earn money = Donkey

Woman = eat + sleep + spend money
Donkeys = eat + sleep
Therefore, Woman = Donkey + spend
Woman - spend money = Donkey ------------------------(2)
In other words,
Woman who doesn't spend = Donkey

To Conclude: Add (1)+(2)

Man + Woman = 2 Donkeys !

Moral of the story
* Men earn money not to let women become Donkeys!
* Women spend not to let men become Donkeys!