University of Illinois professor Brian G. Ogolsky, an expert on family studies, says that if couples equally share cleaning duties, their chances at marital satisfaction are excellent. However, once a partner starts to slack off, you can expect trouble. In studying the various beliefs and behaviors of more than 200 married couples, Ogolsky found that women were significantly happier if their husbands shared their attitudes about dividing household chores, although the same wasn’t true the other way around. Just the same, people who are about to enter into matrimony should establish ground rules about household labor before they tie to knot, according to Ogolsky. He says that once bad patterns become cemented within two years of the union, they can eventually lead to frequents conflicts and marital discord.