I watched someone deliberately seduce my friend’s partner.
It wasn’t accidental. Wasn’t a situation that spiraled. It was a calculated strategy. The person identified a good mate. Recognized he was already committed. And systematically worked to undermine the commitment.
What struck me was how intelligent it was. How strategic. How it followed an evolutionary logic that was barely hidden beneath the surface.
The research on mate poaching shows that it’s not rare. It’s not pathological. It’s a recognized strategy in human mating. Some people are born strategists. They pursue mates who are already committed because committed mates are proven. They’ve already been selected. They’ve already demonstrated they’re capable of commitment.
Why compete for an untested mate when you can target one that’s been vetted?
The person who does this is typically high in the Dark Triad traits. Narcissism. Psychopathy. Machiavellianism. They lack empathy for the person they’re displacing. They’re willing to use manipulation. They don’t feel guilt about destruction they cause.
But underneath, it’s evolution. It’s the logic that says: that’s a good mate. I want that mate. I’ll use my skills to get that mate.
Women engage in mate poaching too. The research shows that attractive women with certain personality profiles will target married or committed men. They offer something the committed relationship doesn’t. Often novelty. Often sexual intensity. Often the experience of being pursued.
It works because human mating isn’t actually monogamous. Despite the cultural story. Despite the commitment. The impulse to pursue alternatives remains. And mate poachers exploit that impulse.
I watched the dynamic play out. My friend’s partner, who seemed committed, was susceptible because the mate poacher offered something. The recognition. The pursuit. The excitement of being wanted. The mate poacher understood the vulnerability in the existing relationship and exploited it.
What struck me was that the mate poacher wasn’t wrong about the mate’s quality. He was a good mate. He was worth poaching. The strategy was sound.
The research on this shows that mate poaching is more common among people who are either very attractive or very skilled at manipulation. They’re playing an aggressive mating strategy. They’re not trying to find a mate. They’re trying to steal a good mate from someone else.
This is particularly interesting because it reveals something about human sexuality. We like to believe in monogamy. In commitment. In the permanence of pair bonding. But the reality is that humans are designed with the capacity for both monogamy and infidelity. Both commitment and wandering.
Mate poachers are exploiting this design. They’re activating the wandering impulse. They’re demonstrating the existence of alternatives. And they’re offering something the committed relationship has stopped offering: the feeling of being chosen.
I watched this person systematically dismantle a relationship that had been solid. Not through drama. Not through force. Through subtle communication. Through positioning themselves as the person who understood something the partner needed. Through making the original partner seem like they were insufficient.
It was sophisticated. And it worked.
The research on mate poaching shows that it’s more successful when the existing relationship is already showing weakness. The mate poacher looks for the relationship that’s become routine. Where the original partner has stopped investing in attraction. Where there’s resentment building. Where there’s emotional distance.
Then the mate poacher offers everything the relationship has lost. Fresh attention. Genuine interest. The excitement of being pursued. It’s irresistible because it’s the opposite of what the committed relationship has become.
This is why commitment requires ongoing investment. Why you can’t take a mate for granted. Why the work of maintaining attraction is actually about competing against the possibility of poaching.
The person doing the poaching understands this. They’re targeting the weakness in the system. They’re exploiting the gap between the committed relationship and what the partner needs.
I think about the conversation where my friend found out. The betrayal was obvious. But underneath the betrayal was something more interesting. A strategy. A logic. An evolutionary imperative.
The mate poacher wasn’t evil. Evil requires intent to harm. The mate poacher was amoral. They were pursuing a successful strategy. The harm to my friend was irrelevant. Literally. The mate poacher didn’t feel it.
The partner who was poached wasn’t weak. He was human. He was vulnerable to the strategy because all humans are vulnerable. The strategy is ancient. It’s been refined over millennia. It works because it targets actual human needs.
What was most disturbing was recognizing that the mate poacher was correct about something. The original relationship had become stale. The partner was neglecting the mate. The mate poacher offered something real that the original relationship wasn’t offering.
The solution wasn’t to condemn the mate poaching. The solution was to ask why the original relationship had deteriorated. Why the partner had become vulnerable to poaching. Why the mate had stopped receiving what they needed.
The evolutionary logic is clear: if you stop investing, someone else will. And they’ll succeed.
This doesn’t make mate poaching okay. But it explains it. It reveals the logic operating underneath. It shows that infidelity and betrayal aren’t just emotional violations. They’re strategic moves in a game that’s been going on since humans started pairing off.
The research shows that humans who successfully maintain long-term commitments are those who understand this. Who continue to invest. Who continue to offer what the partner needs. Who recognize that commitment is not static. It’s a choice made continuously.
The mate poacher simply reminds you what happens when you stop choosing.
Citation:
Schmitt, D. P. (2004). The big five related to risky sexual behavior across 10 world regions: Differential personality associations with disease prevalence and AIDS death rate. European Journal of Personality, 19(4), 311-325.
Schmitt, D. P., & Buss, D. M. (2001). Human mate poaching: Tactics and temptations for infiltrating existing mateships. Journal of Personality and Social Psychology, 80(6), 894-917.
Goetz, A. T., & Shackelford, T. K. (2006). Sexual coercion and forced in-pair copulation as sperm competition tactics in humans. Human Nature, 17(3), 265-282.
Buss, D. M., Shackelford, T. K., Kirkpatrick, L. A., Choe, J., Lim, H. K., Hasegawa, M., … & Queener, A. (2020). A half century of mate preferences: The cultural evolution of values. Journal of Marriage and Family, 73(5), 953-966.