6. Norway
41%
The recent study has shown that in Norway there is 41% of adulterous couples. Norwegian University of Science and Technology conducted a survey of how people react to infidelity. Men are usually very jealous when their wives cheat on them (sexual infidelity) and women are more likely to be jealous when men become closer to someone else, even when there’s no sex (emotional infidelity). But, it looks like they are jealous, but not very faithful themselves.