MODERN MATHS - How man is different from Donkeys

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 enjoy = Donkey that work

Equation 2
Men = eat + sleep + earn money
Donkeys = eat + sleep
Therefore, Men = Donkeys + earn money
Therefore,Men - earn money = Donkeys
In other words, Men that don't earn money = Donkeys

Equation 3
Women = eat + sleep + spend
Donkeys = eat + sleep
Therefore, Women = Donkeys + spend
Therefore, Women - spend = Donkeys
In other words, Women that don't spend = Donkeys

To Conclude from Equation 2 and Equation 3
Men that don't earn money = Women that don't spend

So, Men earn money not to let women become Donkeys! (Postulate 1)
And, Women spend not to let men become Donkeys! (Postulate 2)

So, we have...Men + Women = Donkeys + earn money + Donkeys + spend
money

Therefore...from Postulates 1 and 2, we can conclude
Man + Woman = 2 Donkeys that live happily together!