Humans Vs Donkey's

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!