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The Reasons Men Cheat During Summer--And How To Deal

Studies show that men are more likely to two-time in warm-weather months. Look out for warnings and know how to handle the sitch.

We hate to put a damper on all the out-of-town trips you've been planning, but there's some surprising news you need to know: Summer is cheat season--the time of year when people are most likely to sneak around on their partners. And, surprise: Guys are more prone to being summertime two-timers because they're more likely to stray in general, says Diana Kirschner, PhD, author of Love In 90 Days.

We're not saying that your man is going to leave any day now. But, it's wise to read these warnings so you get a handle on why it may happen and recognize the hints that can tell you if he's been fooling around.

Reasons Men Two-Time During Summer

Remember when you were a kid and summer meant no school, freedom, and fun? That attitude carries over into adulthood, leaving us with the sense that during these months, the usual rules don't apply. "Some men take this to mean that it's okay to cheat once the hot weather rolls around," explains Daniel Kruger, PhD, evolutionary psychologist at the University of Michigan. "They think, 'Oh, it's just a summer fling'--as if normal couple behavior is on hiatus."

That same outlook also makes people associate summer with adventure. "Now is the time when you're more apt to try something new, and any novelty increases your body's production of dopamine, which triggers the release of testosterone--two chemicals associated with energy, elation, and sex," explains Helen Fisher, PhD, author of Why We Love. Translation: A guy may seek sexually-charged situations and could give in if tempted.

People are also simply way more social in the summer. Balmy weather puts us in a more gregarious frame of mind, drawing us together via lots of social events. "With more people in a friendly, even flirty, mood coming out to socialize, there's a larger market of women to mingle with and, thus, increased chances for a man to be unfaithful," says Kruger.

And, let's not forget the obvious: When the temperature goes up, clothes come off. Since guys are so easily turned on by all the female skin they see poking out of sundresses, they're in a constant state of heightened desire. It may be easier for them to succumb to lust should an opportunity arise.

Signs Your Guy May Dog Around On You

Watch out if he doesn't invite you to a work event that other coworkers' partners are attending, like a summer outing or after-work pool party. "Not inviting you implies that he doesn't want them to know he has a girlfriend so he can flirt with someone else," says Kirschner.

Also, though it's normal for guys to check out other women for a second or two, even if you're right there with him, be concerned if he's taking "more than a quick glance in front of you. It's a sign he isn't concerned with appearing faithful and may be open to playing around," says Kirschner.

Another red flag is if he tells you that he wants to use his summer vacation to take a guys-only trip and doesn't set aside any time off to spend with you. True, he could just really want to hang out at the beach with his buddies. But, he could also want to mess around out of town, where he's less likely to be caught.

And, take note if he's suddenly paying way more attention to his body. Because of the heat and sun, his torso will likely be exposed when he's out socializing. If he gets obsessive about waxing his back hair or lifting weights at the gym, his MO may be to attract other women, says Kirschner.

Should you notice any of these tip-offs, it's a good idea to ask him if everything is all right and if he's happy in the relationship. He won't necessarily 'fess up, but it may give him the chance to admit that he's been feeling restless or bored.

Keep Your Man Loyal

True, you can't totally cheat-proof things. (Damn.) But, you can at least reduce the number of opportunities your guy has to play around on you. Make sure you plan lots of summer activities for you two only. "If he's spending a lot of time with you, he won't be able to catch the eye of other females," explains Mira Kirshenbaum, author of When Good People Have Affairs.

And of course, keep your sex life on high boil. Luckily, summer presents tons of ways to be creative in this department. Ask him to go on a secluded bike ride with you, then make a pit stop on an empty stretch of road, and do the deed when the coast is clear. Or, check out our Cosmo Sutra collection and experiment with a few underwater maneuvers at the beach. "Mixing things up will leave him, and you too, satisfied and fulfilled and much less likely to wonder if he's been missing anything with other women," says Kirshenbaum.

Ultimately, however, your guy has to dig you enough to resist all the temptations that summer throws his way. If he doesn't and you find out he did stray, you may have to ditch him.

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