Man - Woman Equations.....

Equation 1

Human = eat + sleep + work + enjoy
 

Donkey = eat + sleep + work

Therefore:
Human = Donkey + enjoy

Therefore:
Human - enjoy = Donkey
 

In other words, a Human that doesn't know how to enjoy = Donkey that works.
 

Equation 2 

Man = eat + sleep + earn money
 

Donkey = eat + sleep
 

Therefore:

Man = Donkey + earn money

Therefore:

Man-earn money = Donkey
 

In other words,  Man who doesn't earn money = Donkey

 

Equation 3

Woman= eat + sleep + spend
 

Donkey = eat + sleep
 

Therefore:

Woman = Donkey + spend

Woman - spend = Donkey

In other words,  Woman who doesn't spend = Donkey
 

To Conclude:

From Equation 2 and Equation 3
 

Man who doesn't earn money = Woman who doesn't spend
 

So, Man earns money not to let woman become a donkey! And a woman spends not to let the man become a donkey!
 

So, We have:

Man + Woman = Donkey + earn money + Donkey + Spend money
 

Therefore. from postulates 1 and 2, we can conclude

Man + Woman = 2 Donkeys that live happily together, earning and spending!