People might think they will be happy with numerous sexual partners, but they are happiest taking care of the people in the family, a new global study suggests. For the findings, the research team surveyed over 7,000 people from 27 different countries about what motivates them, and the findings go against 40 years of research.

"People consistently rated kin care and mate retention as the most important motivations in their lives, and we found this over and over, in all 27 countries that participated," said study researcher Ahra Ko from Arizona State University in the US.