Lately I've been thinking about porn.
Not like that, no.
But as in: Porn is the one thing that always makes money. And I've been curious about how to break into it, what kind of money one could make, and so forth.
This is no different than any other market for a working, non-fine-arts photographer. I'm not planning on doing it, but who knows what's down the road.
The point is that I've considered selling stock photos of trees and birds and mountain ranges, so why not nekkid women?
Well, here's something amusing I found doing my research: BuyModelPhotos.com. It's an online royalty-free stock agency (using the term 'agency' in the loosest possible sense) for the kind of photos you find advertising 1-900 lines in the back of alternative newsweeklies.