Cheating husbands used to outnumber cheating wives, but not anymore, according to a recent infidelity study by Coffee and Company, a British marriage bureau. Of the 3,000 participants, nearly 20 percent of women confessed to cheating. Meanwhile, the AskMen.com “Great Male Survey 2010” and “Great Female Survey 2010” found that 5 percent of women cheated on their partner, while less than 3 percent of men admit to it. Why are more women being unfaithful in their relationships? We uncovered 10 reasons -- and some of them may surprise you.