I think we have been over-stimulated!! I remember 15 years ago, I would get soo horned by seeing some tits on Cinemax. Now, I watch 20 guy gangbangs, double anal, bukkake vids, and all sorts of other nastiness! Plus I look at tits all day at work on my iPhone so maybe I have been desensitized or something. I look at normal porn now and yawn, rather watch a Seinfeld or pawn stars...