(Our happy hour fact to amaze your pub-going pals with.)

Friends with benefits sexual encounters have no negative effect on the emotional well-being of young adults.

Researchers at the University of Minnesota, USA asked 1,311 sexually active male and female college students a battery of questions pertaining to their mental health and self-esteem. As part of the survey, students had to classify their last sexual encounter as being either casual or with a committed partner.

Much to the researchers' surprise, they found that the 20 percent of students who had a meaningless romp had the same level of overall psychological health as those who were getting it on monogamously.

However, in the findings, twice as many guys as gals 'fessed up to casual sex. Meaning, for some, the road to emotional well-being may include a dose of delusion.