Why do some men need permission from the wife, to buy something?

Like the title says, why should a guy need permission from his wife or Girlfriend to buy something? If he worked for it and pays the bills I believe he's untitled to buy whatever he wants. I never hear men say well the Wife had to ask me to buy something. Come on ladies admit it when it comes to shopping and spending money, you have no right to complain. I'm asking this because I heard this gentlemen say on one of those shopping channels tell the host, well I liked this but had to ask the wife. Give me a break.
Why do some men need permission from the wife, to buy something?
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