There's an interesting website out there, "Your Brain on Porn". What's neat about this website is that they look at internet pornography from an evolutionary perspective. There are a lot of parallels with modern junk food: our bodies and brains aren't equipped for any type of "super-stimuli".
A troubling side effect of all this is an apparent link between excessive porn use and erectile dysfunction. Just as real food isn't enough if a person is in the throes of junk food, a real person may not be enough compared to the fantasy images on the internet.
Unfortunately, I think this overall trend will get worse in the future, especially as younger people now are growing up with the internet.
