You might think twice when your partner suddenly wants to lose weight.

It might be for somebody else.

Study claims that when your partner abruptly decided to fight the flab, and you’re in a long-term/steady relationship, that person maybe planning to break up with you.

Sometimes when your in a happy relationship, the person does not worry when they get fat.

There is less pressure to be attractive, the sociologists claim.

Professor Thomas Klein was the one who studied those behaviors. He said that there is a link between happiness and body weight and said the warning signs could include a sudden need to go to the gym or being more involved in sports and starting a new diet.

He added, “When your on the lookout for a new partner, people try to be as thin or attractive as possible.”

When the partner will starts to slim down they might be preparing for ‘the partner market.’

Klein also said, “People in a relationship feel less pressure and often put on weight as they do not watch their weight so much.”

“In a happy partnership, people tend to get fat, with less competition, the weight difference is low.”

But when there is a problem in the relationship, the partners can also lose weight.

The study involved 2,000 people between 16 and 55. Researchers found that most single people weighed less than with partners in hopes to attract people in the market.

There is also another U.S. study that married couples put on weight through ‘marital synchronicity’ on which when couple shared the same environment and food with each other,and also not being active or no exercise.

Researchers said, “Once the ink on the marriage contract dries up, they relax the control they had on their weight and appearance.”