Here's another reason why you should shed the flab -- excess weight can hamper your bedroom life, for a study has found that obese people have less sex.
An international team, led by Professor Frances Quirk of James Cook University, has carried out the study and found that in addition to increasing health risks, obesity can kill overweight people's sex lives.
According to researchers, there are several biological and physical factors, which could lead to a decrease in sexual functionality.
"Sexual dysfunction is very personal and even within a relationship lots of couples find it very difficult to talk about changes. One partner may say, 'I think something has changed and I don't know what it is, while the other is thinking 'they've gone off me'.
"Excessive weight gain may lead one partner to find the other less physically attractive, a change in hormone production and lower energy levels and all these things can have a negative impact on your sex life," Prof Quirk said.
According to the researchers, people are likely to be attracted to certain body shapes in the opposite sex.
"When men see women with a small waistline and broad hips the are just primed to respond to those shapes, while women are attracted to the triangular shape of a man. These body types are indicative of hormonal and physiological characteristics that are naturally attractive.
"With a round body shape all of those cues are hidden so what you're relying on in terms of your own sexual response to someone is subjective feelings," Prof Quirk said.