ScienceWin McNamee / Getty Jay Z and Beyonce.Love is mysterious, but it's probably not destiny.
According to the research, your hormones, interests, and upbringing all help determine who you fall for - and who falls for you.
Since your partner plays a significant role in your long-term health, happiness, and even your career prospects, we've scoured the studies and collected some of the psychological reasons two people click.
This is an updated version of an article originally written by Maggie Zhang.