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 Episode 1
W: Sweetheart, do you have some money?
M: Sure! How much do you want?
W: Uhh...About a thousand dollars?
M: Where are you going to use that amount of money?!
W: To our child's preschool.
M: A preschool receive a tutition fee of two thousand dollars?
W: Almost all good preschools do it.
M: I don't want my child to suffer from schoolwork from the age 5. You should have talked to me before deciding.
W: You cannot invest a thousand dollars to your child?
M: I cannot afford a thousand dollars every month!
W: You didn't tell me how much do you earn every month, so I thought that you can afford it! You should have told me your exact income to me!
M: All of my friends are having their income as a secret to their spouse, and their spouse uses a small amount of money so they can afford it by themselves.

 Episode 2
W: Sweetheart, I want a Louis Vuitton bag and a Gucci bag. Could you pay for it?
M: What? I don't earn enough money for that!
W: My friends say that their spouse have a lot of money and buy good bags for my friends.
M: I'm sorry. I cannot afford it. I'll work hard and earn a lot of money.
W: So you cannot buy me those bags?
M: I'm sorry. I'll buy you better bags next time.
W: You said that you are going to buy it next time at 2014! I cannot believe you! Do I need to buy Louis Vuihhorn bags and Gukki bags?

 Episode 3
M: We need to prepare for our future. Let's make a deposit for 500 dollars every month.
W: That's a good idea.
6 month later
M: Why are you not banking?
W: I think that 500 dollars are too much. I can't afford it.
M: So only I am banking! You should have told me when we started to make a deposit!

If we don't know the exact income of our spouse, it might give us disadvantages. In conclusion, I think that we need to know the income of our spouse.