Interesting. I do think that the data on the "no penetration" in fics is possibly skewed, however. That is, I generally didn't include too many G or PG rated fics in my data set because they wouldn't have any penetration and so wouldn't say much to the question of who tops more. But if you're just talking about NC-17 fics, maybe it does say something. To be sure, I'd want to really focus on that data in my analysis. Right now it's mostly an afterthought, not a bit of data that I paid as much careful attention to. But I'm glad it is of interest to you!