Of the 16 qualities, men ranked sense of humor as the quality they found most attractive in a significant other.

Psychology Today published a feature on the Baining people in Papua New Zealand that they designated the "dullest culture on earth." In their culture, play is forbidden, with adults sometimes holding children's hands to fire to discourage their normal state. For the Baining, play is seen as the domain of animals, while work is seen as innately human.

That may not the case as new research shows play is very much part of human nature. According to a new study, researchers theorize that the evolutionary reason behind humans' persistence of play well into adulthood is to help them find mates.

Read more at Medical Daily.