Equations

   Equation 1

   Human = eat + sleep + work + enjoy

   Donkey = eat + sleep

   Therefore:

   Human = Donkey + Work + enjoy

   Therefore:

   Human-enjoy = Donkey + Work

   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!