maths formula...

Human = (Eat+Sleep)+Work+Entertainment
Pig=(Eat+Sleep)
Human = Pig + Work +Entertainment
Human - Entertainment = Pig + Work
SO! If the person dun know how to entertain.. that person is just like a working pig
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Man = (Eat+Sleep)+Earn Money
Pig = (Eat+Sleep)
Man= Pig + Earn Money
Man- Earn Money = Pig
SO! If the man don't know how to earn money.. then he is Pig
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Woman = (Eat+Sleep) + Spend Money
Pig = (Eat+Sleep)
Woman = Pig + Spend Money
Woman - Spend Money = Pig
SO! If the woman Don't know how to spend money.. Then she is Pig
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So from all above..
Man Don't want Woman to become a pig.. so they keep earning money
Woman Don't want Man to become a pig.. so they keep spending money
So
Man+Woman= (Eat+Sleep+Earn money)+(Eat+Sleep+spend money)
= 2(Eat+Sleep) + (earn money+spend money)
= 2(Eat+Sleep)= 2 Pig..
SO! Man+ Woman= 2 pig...