LOS ANGELES (CBS) — File this one under “Well, duh!”

A new study says men like women to do all the housework and chores. A researcher claims men relax better if they can put their feet up and let their wives cook and clean.

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Double duh!

This new study — from USC — is sure to ignite the ages-old war between the sexes…being waged since men did the hunting and women did the gathering.

The study also revealed another shocker. Women want men to get off their lazy butts and help! Women’s stress levels go down when men help with the chores. Finally, there is a a scientific justification for women to get mad while their husbands watch football all day Sunday!

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Ironically, the opposite is true with men. Their stress levels fall while they relax and their wives are busy! Men are from Mars, Women are from Venus…and they’re doing all the mopping and dusting, apparently!

The study found there was even a link between household activities and physiology. In particular, the way in which couples divvy up chores affects their bodies’ ability to deal with stress.

Lead author Darby Saxbe says, “Dividing up your housework fairly with your partner may be as important as eating your vegetables.”

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The study is published in the April issue of the Journal of Family Psychology.