Once a Cheater, Always a Cheater? What the Stats and Real Life Say For Gay Life After 40

I am sure you heard what happened to the CEO and the HR Director at a recent Coldplay concert. I kept on thinking of that dreaded phrase: “Once a cheater, always a cheater.” It gets passed around like gospel after a breakup, especially one involving betrayal. And let’s be honest—if you’ve been cheated on, believing that your ex was always destined to do so can bring a strange kind of comfort. But is this adage actually true? Or is it just a defense mechanism that helps us cope with heartbreak?

As gay men over 40, many of us have weathered the emotional ups and downs of long-term relationships, open arrangements, and everything in between. We’ve learned to ask harder questions, and one of those is: Can people really change, or are some patterns permanent?

The Psychology Behind Cheating

Cheating is rarely just about sex. It can be about power, validation, opportunity, impulse control, or even unaddressed trauma. For some, cheating is a symptom of deeper relational dissatisfaction. For others, it may be a lifestyle—especially in situations where honesty and boundaries aren’t valued or respected.

Psychologists suggest that people cheat for a variety of reasons, but patterns can form. According to a study published in the Archives of Sexual Behavior (2017), individuals who cheated in a previous relationship were three times more likely to cheat again in a future one. That’s a significant number—but it’s not destiny. It’s a statistic, not a sentence.

Why Do Some People Repeat the Pattern?

Here’s where it gets real. People repeat behaviors that go unexamined or unchallenged. If someone cheats, faces no consequences, and never does the internal work, then yes—they’re very likely to cheat again. Especially if they see cheating as a viable way to meet their needs or avoid conflict.

This is even more relevant for those of us navigating love and intimacy after 40. We may have fewer illusions, but we also may have more to lose—our time, emotional energy, and trust aren’t as freely given as they were in our twenties.

Can a Cheater Change?

Absolutely—but only if they’re willing to confront their own behavior. Therapy, accountability, open communication, and time are crucial components of meaningful change. It’s not just about promising not to do it again—it’s about understanding why they did it in the first place.

A different 2018 study in the Journal of Social and Personal Relationships found that people who take responsibility for past cheating and commit to self-growth show a much lower chance of repeating the behavior. In other words, change is possible, but it isn’t guaranteed.

So What Should You Believe?

Rather than taking “once a cheater, always a cheater” as law, treat it as a caution sign, not a stop sign. Yes, past behavior is a red flag—but so is denying someone the opportunity to grow. If you’re in a situation where someone is asking for a second chance, ask yourself:

• Have they acknowledged the betrayal without minimizing it?
• Have they shown consistent behavior change?
• Have you healed enough to truly re-engage without resentment?

Forgiveness doesn’t mean forgetting, and moving on doesn’t always mean staying.

Final Thought:
When someone shows you who they are, believe them—but leave room for the possibility that who they are can evolve. Especially if they’re doing the work. As gay men over 40, we’ve seen how life can surprise us. Maybe change is one of those surprises, too.