A scientific guide to never getting cheated on.

This 4-minute read could save you from the worst kind of heartbreak.

You don’t need to be cheated on to know you don’t want to be.

I’m sure it’s something you’ve been concerned about at some point in your life, and for good reason. Being cheated on can be emotionally traumatizing, and socially humiliating.

Well, what if I told you there was a way to practically ensure you never have to worry about it happening to you?

Well, you’re in luck, because this is my science-based guide to never getting cheated on. All you have to do is follow the steps below and the chances you ever get cheated on fall to practically zero.

Avoid relationships with people who’ve cheated before.

I’m sure this won’t be much of a surprise to you, but the phrase “once a cheater, always a cheater” actually has a lot of truth to it.

Research suggests that individuals who had previously cheated were found to be 3 times more likely to cheat in a future relationship compared to those who had never cheated.

My recommendation is pretty simple, don’t form a long-term relationship with someone who has cheated in the past. Yes, she may be different, some individuals can change, but the stats say the odds stop being in your favour the moment you overlook this critical attribute of a person’s past.

Be wary of people with a family background of cheating.

As uncomfortable as it might be to admit, a large part of who we are comes down to genetics—and whether a person cheats is no exception. In a study of over 7,000 Finnish identical twins, researchers found that genetics accounted for 40% of the variance in whether women cheated, and 62% for men.

Now, this doesn’t mean that if someone’s parents cheated, there’s a 40%/62% chance they will too. We don’t inherit all of our parents’ traits. But it does mean that there’s a significantly higher likelihood of cheating if there’s a family history of infidelity.

My recommendation here isn’t as strict as “avoid someone with a cheating past” because genetic traits are hard to predict (my father cheated, and neither I nor my brother ever have). Instead, treat it as a potential red flag. If this trait stacks up with other warning signs in this guide, it’s worth considering whether the relationship is worth the risk.

Be wary of those with extensive sexual pasts.

This is likely something you're already intuitively aware of, and for good reason—both women and men who have more relaxed standards for sexual intimacy are statistically more likely to cheat.

It’s not just about the total number of sexual partners, though that can be telling. The circumstances under which those partners were engaged matter too. Studies show that individuals more open to casual sex often face relationship difficulties, including lower satisfaction and a higher likelihood of cheating.

My recommendation is to view this as another potential red flag. If a girl you’re seeing sounds like she has an extensive history of casual relationships it’s worth considering not moving forward with the relationship, especially if she shows other warning signs in the guide.

Be clear with mate-guarding boundaries.

In case you didn’t know, mate-guarding is a strategy used to protect your romantic relationship by setting boundaries that minimize opportunities for your partner to engage with others in a flirtatious or sexual manner.

Examples include setting boundaries around things like girls' trips, wearing revealing outfits when you're not around, or hanging out 1-on-1 with male friends.

Some might say mate-guarding is controlling, but in my experience, it’s just setting healthy boundaries. It’s a lot less likely your girl will cheat on you if she doesn’t engage in any of the behaviours above.

There’s a caveat here though, you can’t be a hypocrite when negotiating these terms with your potential partner. It’s difficult to expect your partner to respect these boundaries if you aren’t willing to do the same. But if you both agree to uphold the same standards, any mate-guarding suggestions become a far more reasonable and balanced ask.

My recommendation is when deciding whether to become exclusive with a girl set clear boundaries that you’re both comfortable with. This will significantly decrease the chances either of you cheat, but honestly, you should be more worried about yourself cheating than her…

Don’t cheat on her

Statistically speaking, as a man, you are about twice as likely to cheat compared to your partner. And if you want to avoid being cheated on, one of the worst things you can do is cheat yourself.

Research shows that about 30% of women who cheat, cheat to get back at their partner for cheating. This means that making sure you don’t cheat should be just as much a priority as making sure you’re partner doesn’t. I know you don’t think you would, but put in the wrong situation your biology might just get the best of you, so I highly recommend following the section above.

Summary

This guide boils down to two key parts:

  1. Avoid relationships with women who have a history of cheating, a family history of infidelity, or an extensive sexual past—especially if multiple factors overlap.

  2. Set clear, mutually agreed-upon boundaries that are fair and reasonable. This will greatly reduce the chances that either you or your partner will cheat.

Getting cheated on is something I might wish upon my worst enemy, but I certainly wouldn’t wish on you(you’re subscribed to my newsletter, we’re basically family at this point). So I highly recommend following the steps of this guide to ensure you never find yourself in the painful position of being betrayed in one of the worst ways possible.

I hope you enjoyed it, leave any thoughts in the comment section of the poll below (I read every single one)…

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