Simple Equation.....

Equation 1

Human = eat + sleep + work + enjoy
Donkey = eat + sleep

Therefore:
Human = Donkey + Work + enjoy

Therefore:
Human-enjoy = Donkey + Work

In other words,
Human that don't know enjoy = Donkey that work.

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Equation 2

Men = eat + sleep + earn money
Donkey = eat + sleep

Therefore:
Men = Donkey + earn money

Therefore:
Men-earn money = Donkey

In other words
Men who d'nt earn money = Donkey

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Equation 3

Women= eat + sleep + spend
Donkey = eat + sleep

Therefore:
Women = Donkey + spend
Women - spend = Donkey

In other words,
Women who don't spend = Donkey

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To Conclude:
From Equation 2 and Equation 3

Men who don't earn money = Women who don't spend

So Men earn money not to let women become donkey!
And women spend not to let men become donkey!

So, We have:
Men + Women = Donkey + earn money + Donkey + Spend money

Therefore from postulates 1 and 2, we can conclude
Men + Women = 2 Donkeys that live happily together!