Your Cheatin' Heart: It's Genetic - Human Infidelity Linked to Gene

Swedish researchers said Tuesday what women have suspected all along: that marital woes can often be attributed to men's genetic makeup, according to a study linking a common male gene to relationship problems.

"There are, of course, many reasons why a person might have relationship problems, but this is the first time that a specific gene variant has been associated with how men bond to their partners," Hasse Walum, one of the researchers, said in a statement.