Genes decide marital quality
　Swedish researchers said Tuesday what women have suspected all along: that marital woes can often be attributed to men's genetic make-up, according to a study linking a common male gene to relationship problems.
　The gene variant, which is present in four of 10 Swedish men, can explain why some men are more prone to stormy relationships and bond less to their wives or girlfriends, a team of researchers at Stockholm's Karolinska Institute said.
　"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 ....