It's a solid combination between good draftsman ship, understanding of simplification and colors. His rendering is not over-complex as it seems, it just knows were to add detail and were to simplify things.
Call me crazy, but one thing I realize as it late is that, surprisingly enough, good background art and solid composition are probably one of the most important things you want to focus on after achieving a certain level, mid/int/ or so.
Yeah, you can keep doing the classic pin up art in porn but it will never stand out as much as something with a solid background to ground the characters in place and build the scene and atmosphere, the subject of being sexual becomes this beacon that attracts you attention, but the background and art gives that "wow" factor that make people want to share your work because in the end they just liked the pic this much. Really weird when you think that what makes popular NSFW are the SFW elements.
