The truth is, while certain personalities may be best suited to each other, it doesn't mean that other matches can't work. I've just completed a study with three fellow scientists on men and women who reported still being madly in love after an average of 21 years of marriage. We found that their brain scans showed high activity in regions associated with romantic passion and attachment—key no matter what personality type you are. So to those who are jaded about finding a mate, clichéd as it may sound, I urge you to keep an open heart. We are wired to find love.

See the most popular love-type-combinations