Human = eat + sleep + work + enjoy
Human = Donkey + work + enjoy
Human - enjoy = Donkey + work
Human that doesn't know to enjoy = Donkey that work
============ ========= ========= ========= ========= ===
Men = eat + sleep + earn money
Men = Donkeys + earn money
Men - earn money = Donkeys
Men that don't earn money = Donkeys
============ ========= ========= ========= ========= ====
Women = eat + sleep + spend
Women that don't spend = Donkeys
============ ========= ========= ========= ========= =====
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)
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!