Evolutionary differences hardwired into their brains means that women often prefer to date men who can make them laugh.
Researchers discovered that women's brains show more heightened activity than men's in response to humour, the Daily Express reported.
It is believed that ladies use a man's ability to make them laugh as a way to judge his genetic fitness as a fitting husband and the prospective father of their children.
The study, which was carried out by Stanford University School of Medicine, comprised of scanning the brains of 22 girls and boys, between the ages of 6 and 13, while they viewed funny videos.
The study found that while watching the humorous clips, girls' brains showed more heightened activity than the boys.
Scientists said that their findings suggest selecting a mate by responding to humour is more effective in women "because the female brain, and particularly the reward circuit, is biologically better prepared to respond accordingly".
The research was published in the journal Social Neuroscience.