'We get mistaken for siblings so often' - why couples match
The phenomenon of 'assortative mating' or homogamy explains why romantic partners often share striking similarities in appearance, personality, and background. Experts suggest that people are naturally drawn to those who mirror their own traits, habits, and social characteristics.
Why it matters
Understanding relationship dynamics provides insight into social patterns and human behavior in partner selection.
Josie Morgan-Clarke and her partner both have ADHD and enjoy the same music and the same outdoor activities.
Inga Ting for ABC 18 July 2026 20 min read Caption: The biggest difference between Josie Morgan-Clark and her partner is that he thinks she's smarter and she thinks he's funnier. Photo credit: Supplied Once I saw it, I couldn't unsee it. I noticed it among friends. Then within my family. It is rife among my colleagues.
Romantic partners who are strikingly, in some cases, uncannily, similar to one another, whether in their appearance, personality, habits, attitudes or characteristics such as age, ethnicity, religion or education.
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