Contrast couples, where one partner significantly differs physically from the other, have long intrigued psychologists. At the core, these relationships challenge our inherent biases towards homogamy – the tendency to choose partners similar to ourselves.

Delving into the psychology, attraction to differences might be rooted in compensatory desires. For instance, a tall individual might be drawn to a shorter partner for their perceived agility or delicacy, while the shorter person could admire the towering presence and the feeling of security it provides.

Similarly, in cases of distinct weight differences, it could be about balancing personal insecurities or challenging societal beauty standards. Often, these unions serve as subconscious attempts to find equilibrium; the contrasting traits in a partner might compensate for what one feels they lack. Ultimately, the human psyche is vast and complex.