Researchers at the University of Gottingen in Germany found that people with a less-than-robust sex life tend to take on more work to compensate for their lack of fulfillment in the bedroom. The study asked 32,000 people to describe their sex and work habits. The researchers found that 36 percent of men and 35 percent of women who have sex only once a week plunge themselves into their work. The more work you have, the more stress you have — and the more stress you have, the less sex you have. It’s a truly vicious cycle.