Taking a look at Urban Dictionary, a “doppelbanger” refers to someone you’re romantically or sexually interested in simply because they look like you. It may seem odd (and creepy) to be attracted to someone who looks like they could be your sibling, but there’s actually a scientific reasoning behind the phenomenon. According to Time, people are drawn to others with similar features for numerous reasons. The first is that these features are comforting because you’re so familiar with them already. On the other hand, lookalikes may be attracted to each other due to nothing other than genetics.
Research shows spouses share comparable genetic makeups, which results in a variety of similar characteristics, from their foot size to how good they are at math. Essentially, being involved with a “doppelbanger” is subliminal — the genes want what they want (and sometimes, those genes want 5’9′ brunettes with brown eyes that love jazz). Come on, what’s better than having a partner you can share shoes with?