Nearly everybody considers sexual intercourse or oral sex to be cheating, but there are some other behaviors that fall into grayer areas.
If your partner is cheating, chances are, you have no idea.
Six in 10 cheaters believe they totally got away with their affair and another one in 10 felt their partner was suspicious, but never found out for sure.
For most people in relationships, a commitment means no playing around, ever.
That doesn't mean there aren't plenty of love rats out there.
"It is surprising that the wives and husbands and girlfriends aren't more suspicious," says Lever.
"Even when they know something's amiss — a sex life that's fizzled or intimacy waning — they count on their partner's love to keep them from straying." Philanderers are so inscrutable partly because there’s no single profile for a cheater.
About one in five adults in monogamous relationships, or 22 percent, have cheated on their current partner. And nearly half of people admit to being unfaithful at some point in their lives, according to the results of the MSNBC.com/i Village Lust, Love & Loyalty survey.
More than 70,000 adults completed the online reader survey in February, answering about 30 questions that revealed their intimate feelings about adultery and what makes them stray or stay faithful.
For men with money, infidelity is just another perk. Men want more sex (44 percent), more satisfying sex (38 percent) and variety (40 percent), findings that closely resemble the 2006 MSNBC.com/Elle magazine survey on monogamy.
Among men making more than 0,000 a year, 32 percent report cheating, compared to 21 percent of men making less than ,000 a year. “Wealthy men may simply have more dating opportunities than men with less income,” says David Frederick, a psychologist at the University of California, Los Angeles, who helped analyze the survey findings. “Mostly I’ve cheated because of the excitement,” writes a 38-year-old man who took the survey.
About three-quarters of the survey takers say they've made a monogamous commitment, with a majority either married or remarried.