P.s.

crepers86, there's a fair bit of evidence to back up the porn theory (and not just because P86 says it's about porn).

"It is a basis for your heartfelt hunger so gaze At the page at the faces of nameless" -Looking at pornography in a magazine; he doesn't know the people he's lusting after (the faces of nameless)

"And this distortion is an apt replacement for An unquenchable desire for more More pages strewn across this sickening floor I can't look at this I can't look at you I can't look at me" -Using pornography as an alternative for sex, as a perversion. Pornography is being used to drown out this "unquenchable desire for more". And afterwards the singer feels remorse for his actions, he feels guilty, which is why he can't look at this, you (probably God in this case) or himself.

"And how the children would weep If they only saw what those eyes have seen" -If children were to see what the singer has seen, they would lose their innocence.

"It always keeps us longer than we wanted to stay It always takes us further than we wanted to go But you don't seem to mind at the time" -Perfectly describes pornography, and how it grabs hold of people and becomes an addiction. And indeed, they don't seem to mind until afterwards.

So it's pretty clear that there is plenty of evidence for PS to be about pornography. However, that's not to say that you can't interpret it as a song about abuse. In fact, some people connect pornography with domestic abuse, so there may be something there too.