Men, would you rather play games or have sex?

If you've ever felt you had to compete with your man's Wii for attention, take this as ammunition: A recent study shows that one in three men would rather play video games than have sex with their partner. The study, reported in the U.K. newspaper The Sun, was conducted by the site PS3pricecompare.co.uk and surveyed 1,130 British men. (How surprising: A study sponsored by a video game site says men prefer video games.)

According to Genie James, executive director of the Natural Hormone Institute, hormonal imbalance and stress may be to blame. "It is very likely that these men are suffering from a hormone imbalance at a cellular level that causes them to lose interest in sex," says James.

For example, when testosterone levels begin to decline in a man's 30s and 40s, libido -- or sex drive -- is compromised. Symptoms include fatigue, lethargy and weight gain. "That is why many men come home, plop down on the sofa and pick up the remote or engage in video games. They just don’t feel up to doing much else," James says.

Don't think you're safe, twentysomethings. "Typically, young men in their teens and 20s are sexually rambunctious but -- in the last several decades -- young men living in industrialized nations like America have shown reduced sperm count and quantity of ejaculate. Both of these evidence an early decline in testosterone levels," she says. Scientists attribute this trend to the high levels of foreign hormones, called xenohormones, that are found in many foods, including meat and milk, as well as in common inhalants such as fumicides and pesticides.

So, what's a guy to do? You may not want to hear this, but the most important thing is to exercise. "Exercise naturally boosts lagging testosterone levels," says James. "Also, clean up your diet. Go organic when possible to decrease exposure to xenohormones. Give up the nachos and beer while sitting on the sofa. Remember that all those pounds packed around your middle are literally decreasing your 'manliness.' "