I have to say, I look at most porn tumblrs without following them so what you’ve said is more than more than true.

Hear, hear. I’ve also noticed that a lot of Tumbler blogs, especially in certain kinks, tend to be a bit incestuous. They all reblog eachother, and if you follow them all the same posts show up on your dash over and over. I’ve unfollowed several Tumblers just to keep my dash clean and streamlined, but I have a Word Doc just for Tumblrs I like but don’t follow.