The “taken partner” effect

The “taken partner” effect is a phenomenon that some may find fascinating and others morally questionable. Psychologists claim that the human brain reacts to the signal “someone has already chosen this person” as confirmation of their value – like a recommendation in the world of emotions. Critics see it as proof of our competitive nature, which makes us desire someone else’s property. An evolutionary theory? Or perhaps just plain jealousy dressed in scientific words? Is it instinct that tells us to pursue what is already taken?