I think these four pics are an amazing lesson that it's not just about how amazing the models look- All of them are amazingly sexy...It's really how how they relate to each other in couples or group shots like these. Public Spectacle and Role Play really showcases the chemistry between the models to make great erotica. Sexploration, despite having to breathtaking Ukrainian models, Anna S and Angelica is distinctive in that there seems to be no real sense of erotic exploration in this particular pic. There is another pic where you have more of it, but all in all, there did not seem to be much passion or communication between the two. They are two amazingly hot model who are in bed with each other, and that's it. Micaela Isuzzu is kissing Sabrisse's leg. It could be a lot more erotic, but for some reason this pic does not seem to showcase that. Both are amazingly erotic models from the Czech Republic, and they have many amazing sets, but put together, the chemistry is off. If this was about sexual chemistry, there was an inert relationship between the two of them.
In contrast it was totally instructive to read Dave Navarro's interview when directing this Penthouse Shoot between Skin Diamon, the adult model and a fetish/burlesque model named Mosh. As the guitarist for Red Hot Chili Peppers and on the show Inked, it was instructive to read how he wanted to have a Kubrick-like set, experimenting with light and dark, and having these two models from two different sides of erotica interact with each other. This shot totally shows chemistry and communicates something...it shows dominance, it shows passion, there is a matter of artistic perspective with the way the models are angled in their positioning which heightens the mood. It's a really good set, by a guest director for Penthouse's Pop Shots. Though I have not been able to find any information about Public Spectacle, of either the models or the photographer, there is conveyed passion as well...light and dark and black and white does that....The angles seems to amplify that erotic chemistry and the blurred background lends a sense of vertigo, of hot dizzying passion that centers on the two models.
For my pick, I'd have to go with Public Spectacle!