According to a study done by the University of Tennessee, husbands are more satisfied in their marriages if their wives have a lower body mass index (BMI) than their own. So it's no wonder that in a dating relationship men are even more shallow.

A survey by Ask Men of 70,000 people from the United States, Canada, Australia and Great Britain has revealed that 48 percent of guys say they would end their relationship with a girlfriend who become fat.

When the same questions were posed to female respondents, only 20 percent said they would ditch a partner because he had packed on excess pounds.

The percentage of men who would dump a women for weight gain was almost exactly the same in each nation.