The Science of Mating

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Sexual imprinting shapes attraction by encoding early relational experiences for what feels desirable.

The parent you felt closest to may influence your adult “type,” emotionally or physically.

What feels like “chemistry” is often familiarity, not necessarily compatibility.

Unfinished relationships can stay active in the mind, pulling you toward similar dynamics.

We all think we know our type: Tall, ambitious, and just emotionally unavailable enough to keep things interesting. Or maybe she has to be blonde, attractive, but at the same time warm and nurturing. What you call your “type” is not just a preference; it’s often a pattern formed early in life, imprinted long before desire became something you could consciously choose.

Sexual imprinting refers to the way early experiences, exposure to caregivers, first romantic encounters, fantasies, and the emotional climate of the home become encoded as templates for what the nervous system later recognizes as desirable. Long established in animal research and increasingly supported in humans, this process suggests that what is attractive and desirable is not as spontaneous as it may feel.6 Your “type,” it turns out, has a history, and understanding that history may be one of the most clarifying things you can do for your relationships.

The Parental Blueprint

The idea of imprinting was first described in animals, among whom early exposure shapes later preferences—but in humans, the process is more complex and shaped by emotional experience and learning.7

Researchers looked at adopted women and the partners they chose. They found that the women’s husbands tended to resemble their adoptive fathers, not their biological fathers, suggesting that early experience played a role. Children form an internal image of what a partner looks like based on the parent they grow up with.2 Interestingly, the more warmth and emotional closeness these women felt toward their adoptive fathers, the more their husbands tended to resemble them in emotional tone and relational style. The parent you felt safest with may have shaped whom you find attractive later in life.

The pattern presents itself differently across genders, as women may not consistently choose partners who physically resemble their fathers. Men, on the other hand, are somewhat more likely to be drawn to women who share certain physical features with their mothers, suggesting a stronger visual imprint.8 The mother-son imprint is one of the more consistent patterns in research, which can feel either reassuring or a little uncomfortable, depending on your experiences, as Oedipus might say.

Adolescence Is the Second Imprint Window

Adolescence is another crucial time when attraction and relationship patterns begin to take shape. During this stage, the brain is especially sensitive to emotion and reward, which means experiences feel stronger and leave a deeper impression.1 At the same time, early romantic relationships play an important role in development, helping shape how we understand connection, intensity, and what relationships are supposed to feel like.5 The adolescent brain is actively learning, evaluating social experiences, exploring different connections, and gradually investing in those that feel most rewarding or meaningful.4 Over time, these patterns are reinforced, shaping what you come to find desirable.

The first person who made your heart race at 15 was not just a crush; they were helping set the tone for how you experience attraction, what feels exciting, what feels familiar, and what draws you in, shaping patterns that carry into adult relationships.3 This is why so many people find themselves drawn to the same type of dynamic or partner, as the brain naturally seeks out what feels familiar, especially when it comes to desire.

The One That Got Away

For many people, the strongest imprint is a person, especially the one who almost worked out but “got away.” What makes those relationships so hard to let go of is the lack of closure. Decades of psychological research show that the brain tends to hold on more tightly to unfinished experiences, remembering them more vividly than completed ones.9 When something is interrupted, it creates an internal tension that keeps the experience active, as if the mind is still trying to complete it. As a result, romantic attraction activates the brain’s reward system, reinforcing intensity and anticipation. When a relationship ends without resolution, that system continues to seek out a similar emotional state and the same sense of possibility.

The Science of Mating

Take our Are You a Good First Date?

Find a therapist near me

This is where attraction can become confusing. A current partner may be available and appear compatible, but something feels missing. Meanwhile, someone who evokes a similar emotional dynamic can feel immediately magnetic. What is often described as “chemistry” in these moments may be the brain recognizing a familiar emotional pattern and attempting to complete what was never finished. In this sense, the one that got away is not always the person themselves, but the imprint they left behind—a mix of emotional intensity and unfinished experience that continues to shape what desire feels like.

What It Means for Your Current Relationship

Understanding sexual imprinting is the difference between saying, “I want this,” and recognizing, “This feels familiar, and that’s why I’m drawn to it.” These are not the same, and they can lead to very different choices and outcomes.

But does that mean something is missing in your current relationship? Not necessarily.

Instead of chasing a perceived emptiness or trying to fill a “phantom void” from the past, focus on what you already have and what it gives you now:

What do you appreciate that is steady, even if it is less intense?

What feels safe, consistent, or emotionally available?

What is working, even if it does not create the same rush?

Attraction often pulls us toward what we recognize, but lasting connection is built on what we choose to value and nurture. And more often than not, it is grace and gratitude for what is already present that allow a relationship to thrive.

1. Braams, B. R., van Duijvenvoorde, A. C. K., Peper, J. S., & Crone, E. A. (2015). Longitudinal changes in adolescent risk-taking: A comprehensive study of neural responses to rewards, pubertal development, and risk-taking behavior. Journal of Neuroscience, 35(18), 7226–7238. doi.org/10.1523/JNEUROSCI.4764-14.2015

2. Bereczkei, T., Gyuris, P., & Weisfeld, G. E. (2004). Sexual imprinting in human mate choice. Proceedings of the Royal Society B: Biological Sciences, 271(1544), 1129–1134. doi.org/10.1098/rspb.2003.2672

3. Collins, W. A., Welsh, D. P., & Furman, W. (2009). Adolescent romantic relationships. Annual Review of Psychology, 60, 631–652. doi.org/10.1146/annurev.psych.60.110707.163459

4. Do, K. T., Paolizzi, S. G., & Hallquist, M. N. (2024). How adolescents learn to build social bonds: A developmental computational account of social explore–exploit decision-making. Developmental Cognitive Neuroscience, 69, 101415. doi.org/10.1016/j.dcn.2024.101415

5. Furman, W., & Collibee, C. (2014). A matter of timing: Developmental theories of romantic involvement and psychosocial adjustment. Development and Psychopathology, 26(4 Pt 1), 1149–1160. doi.org/10.1017/S0954579414000182

6. Little, A. C., Penton-Voak, I. S., Burt, D. M., & Perrett, D. I. (2003). Investigating an imprinting-like phenomenon in humans: Partners and opposite-sex parents have similar hair and eye colour. Evolution and Human Behavior, 24(1), 43–51. doi.org/10.1016/S1090-5138(02)00119-8

7. Lorenz, K. (1935). Der Kumpan in der Umwelt des Vogels. Journal für Ornithologie, 83(2), 137–213. doi.org/10.1007/BF01905355

8. Marcinkowska, U. M., & Rantala, M. J. (2012). Sexual imprinting on facial traits of opposite-sex parents in humans. Evolutionary Psychology, 10(3), 621–630. doi.org/10.1177/147470491201000318

9. Zeigarnik, B. (1938). On finished and unfinished tasks. doi.org/10.1037/11496-025

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