The porn-centric big data project Sexualitics created Porngram, a nifty tool that lets you chart the frequency of terms that show up in pornos uploaded to xHamster between 2007 and 2013. Just enter two terms — “MILF,” and “teen,” for instance — and you’re given a simple line graph showing how their popularity shifted over time.
TIME already ran a few buzzwords through the tool. “Teen” and “Mature” both have dropped off over the years, while “threesome” and “footjob” skyrocketed. “Secretary” went up, then down, and “Boss” went down, then up. “Revenge,” unfortunately, is way up since 2011.
Here, however, is the most important chart of all.
(Photo: randomcuriosity)