The Kinsey Institute for Research in Sex, Gender, and Reproduction at Indiana University reported how approximately 20 to 25 percent of men compared to 10 to 15 percent of women have had an extramarital affair at least once during their marriage.

Here are some of the factors associated with an increased risk:

-having been part of a couple for a long time
-having had a high number of prior sex partners
-being male or black
-living in a central city
-thinking about sex several times a day