I know this thread is a few months old, however I feel strongly compelled to chime in on this one...
Whether you're shooting "erotic" or flat out porn, my advice is to use a GREAT DEAL OF CAUTION in regards to who you deal with! The sad and unfortunate truth is that there are a lot of really ignorant people out there who lack all sense of discretion regarding their own sense of moral high ground. Reading through this thread, I'm reminded of the lady a few years back who had shot some nudes of her young grand daughter. The images were not offensive in ANY way and were in fact quite innocent (I've seen them), however some overly moralistic idiot at a lab got ahold of them and long story short, the poor woman ended up in court and the whole situation turned into a rather significant media fiasco. The court case was ultimately dismissed as I recall, however the whole incident seriously harmed the woman's credibility as a professional photographer.
On a personal level, while not photography related, I had a similar incident occur while I was in college a few years back. Back in 2011 I had created a short video on the work of Leonardo da Vinci for an art history class, including some 3D animations of a few of his more notable inventions (I was taking both Art History II and 3D Modeling & Animation at the time, so it seemed like an interesting way to bridge the classes). The video also included a number of da Vinci's paintings, including the notable "Leda and the Swan". I was ultimately nominated for and received the college's Talent of the Year award for the production, HOWEVER, the video was banned from being viewed at the awards ceremony because "it contained a nude" and was deemed "unsuitable for such a family oriented event". An ignorant idiot who actually worked in the school's art department saw the image of Leda and essentially considered it to be porn. -YES- there's people THAT stupid out there! It didn't really bother me too much personally...I was just honored to be nominated for the award, however several of my professors were in fact quite angry about the situation. Nudes are after all, a time honored tradition in the art world and to have a genuine masterpiece viewed in that context, particularly by someone working in the art department of a college...yea...it turned into a bit of a mess. Interestingly enough, in my haste to complete the video I actually used the wrong Leda...I didn't realize it until some weeks later, however I had actually used Cesare da Sesto's copy done from da Vinci's original by mistake, LOL! Had the video of been banned due to the use of the wrong Leda, I doubt most people would have gotten TOO upset about it, however because it was banned for being viewed as porno, several people (including the Art History teach and my 3D professor) got quite angry about it.
So again, in today's often heated society with some rather unfortunate tendencies towards political correctness where even a 500 year old masterpiece can be taken out of context, USE CAUTION when dealing with anything of an erotic nature. For the time it takes to ask a few questions or make a few phone calls, you might be able to save yourself a world of headaches!