mmm, great article submitted about manipulating women using psychological, emotional and cognitive means. Dude reads article - leaves computer, meets a girl. Dude gets laid.
alternatively: article submitted on how to scale dating sites. Dude has idea and builds new-fangled dating site. Many people get laid by dating site. Dude gets famous for getting other people laid. Many girls thank dude. Dude gets laid.
news.yc is a little more straightforward: geek reads submitted articles. Geek learns about building startups. Geek applies to YC. Geek gets rich. Geek gets laid.
X = the number of possible actions a user can take on your site. Y = the number of actions that can potentially get them laid.
X / Y = the probability of success of your social software. Let's call it the jwz ratio.