Spouses that are financially dependent on their spouse are more likely to cheat, and this is the same regardless of whether they are male or female.
This flies in face of the belief (now proven false) that if someone is financially dependent they will be more faithful. This is actually the opposite. Feeling dependent on someone causes depression and people naturally end up looking for someone else to be their new soulmate, someone with whom they are on a more equal footing.
According to the report people often need an ego boost and an extramarital affair (a big secret) often feels like an ego boost (at least in the beginning). The report doesn't go into detail about what happens after the affair is over, whether the cheater ever confesses and what repercussions occur.
The report, titled "The Effect of Relative Income Disparity on Infidelity for Men and Women", is by Christin Munsch a sociology Ph.D. student at Cornell University and tracks 18 to 28 year old married or common-law couples who were together for more than a year. The report also takes into account and compensates for issues of age, education level, income, religious attendance and relationship satisfaction.
Apparently men are especially vulnerable to infidelity because they traditionally fit the role of breadwinner and when the wife or girlfriend makes more than they do it sparks feelings of inadequacy.
Measurement wise men who are 100% dependent on the women's income are 5 times more likely to cheat.
However this is another factor this report ignores... its called more free time = more time available to cheat. A wife who works 9 to 5 means the husband has plenty of time to cheat in the morning and afternoon.
The reverse is also true however... men who make significantly more than their female counterparts are also more likely to cheat.
The only time men aren't likely to cheat is when their partners make roughly the same or 75% of their incomes.
However this doesn't mean women should be discouraged from pursuing higher paying jobs and careers. If anything this discourages both men and women from chasing after the higher paying jobs because they are both more likely to cheat (and likewise their spouses are more likely to cheat) when there is a huge gap in their salaries.
The good news is that cheaters' wandering eyes stop wandering so much as they age. They might still be looking, but they're not acting on their sexual impulses as much as they did when they were younger.
On a personal note I believe a couple, any couple, should be obsessed with each other. They wouldn't even think of cheating because they are so utterly obsessed and in love with the other person.
Furthermore, it has to be mutual. You can't have one person obsessed with the other, doting on them, bestoying affection and romantic gestures all the time, because then the other person who isn't obsessed and in love feels like they're being smothered and begins to find all the attention annoying.
Its much better to be obsessed and lovey-dovey with each other, because at least then you're only annoying other people who have to endure the public displays of affection and not the ones you care about.
"If you marry a man who cheats on his wife, you'll be married to a man who cheats on his wife." - Ann Landers.