This study, published online in Evolutionary Psychology, revealed that a larger proportion of women than men regretted the last time they had casual sex. Around 35 percent of women regretted their last one-night stand, compared to only 20 percent of men. In addition, about 30 percent of women reported that they were happy about their most recent casual sex experience, compared to over 50 percent of the men. An overwhelming 80 percent of women expressed happiness at saying no to their last casual sex offer, but only 43 percent of men felt the same. One study from 2014 showed that women prefer men with bigger penises for one-night stands , while opting for more humbly hung men for husbands.