The fap roulette games originated from 4chan.org some years ago. Due to the site's high post frequency, a user's post number generates a rather unpredictable range of numbers. Thus, its users began creating fap roulette images that decide your masturbation session based on the last few numbers of your post number.
We have adapted and applied that concept into this website. Clicking the bottom-right button (Roll) will generate five random numbers, shown in the top-right side of the screen, and display a random fap roulette image. The intention is that you then use those random numbers for the displayed fap roulette image.
For more information check out How it works.