Everyone has a natural instinct to get down and dirty, and barring that, look at it. Going through the hierarchies of alt.sex, alt.binaries.pictures.erotica, etc., etc., so on, and so forth, the amount of newsgroups about sex, or with images of sex, is incalculable. That is to say, I don't feel like counting the number of groups in my .newsrc. Take your pick. All kindsa perversions, fetishes, pics, dicks, chains, whips.
Problem is, there's all kinds of spam on it too.
Sometimes it's funny tho. It's when you get the same post 50 times in one day, posted under different names, but with the same photo, that it gets a little annoying. The grand majority of porno on the net seems to be on the web these days. Understandable, tho, since most net activity is also found on the web as well. The problem is, the grand majority of web porno is also for pay .