It’s not exactly rocket science to say that men orgasm more often than women when they have sex with each other. Now, if you had to guess, what do you think happens to this orgasm gap as a relationship progresses from casual hookup to repeated hookup to serious commitment? Yep, the orgasm gap closes. According to new research by Elizabeth Armstrong, a sociology professor at the University of Michigan, women orgasm about 80% as often as men do in close relationships — but only 32% as often in first hookups. This research is based on feedback from 12,000 college students across the country. In other words, yes, the undergraduate female orgasm is a rare and special beast.¬†This is likely due in part to the fact that¬†fellatio tends to be consistent across all relationship types, while cunnilingus comes into play mostly in long-term relationships.