Our happy hour fact to amaze your drinking buddies with.

People with a certain gene variant are more likely to have one-night stands and sex without commitment.

Researchers from Binghamton University sampled the DNA of 181 young adults and also quizzed them on their sexual behavior. Those who had a particular variant of the gene DRD4 -- which regulates the body's reaction to the production of dopamine -- were more likely to pursue one-night stands.

Reason being, people who have this variant get more of a dopamine rush from high-risk, high-reward behavior, such as one-night stands. They are also be more likely to gamble compulsively and consume drugs and alcohol to excess.

So, ladies, when that sweet-talking cad never calls you again, you really are missing out on a world of excitement