The secret to maintaining a happy marriage is based on the wife remaining slimmer than her husband, according to a new study. It’s not about RS gold or games.

Researchers claim both partners are more content if the woman has a lower Body Mass Index (BMI) than the man. A four-year study found that relationships lasted longer if the woman felt more attractive and desirable than her other half. But relationship experts have already dismissed the findings, insisting that size is not necessarily a key factor in a husband finding his wife attractive. The study at the University of Tennessee selected 169 married couples under the age of 35 and asked them to fill in questionnaires every six months for four years. The findings discovered that men with a higher BMI than their wives were happier at the start of their marriage and stayed that way. Equally women with a lower BMI than their husbands were happier than those who weighed more. The findings could perhaps shed some light on last week's announcement that Jennifer Lopez, who is celebrated for her curvy figure, was splitting from her thinner husband Marc Anthony after seven years together.

One of the authors of the report Andrea Meltzer said: “The great message from our study is that women of any size can be happy in their relationship with the right partner. It’s relative weight that matters, not absolute weight.”But relationships expert Jean Hannah Edelstein expressed doubts about the findings. She said:“I would be skeptical that most men would really reject their partners on the basis of being overweight if there were no other issues.”