Love the concept! Detail and style are wonderful too, but I like your idea of more positive images about sex. A nice proyect, indeed!
I like the way you represent that naughty, sexual-sensual, devil, elongated, nearly serpentine, away from modern beauty cannons and the usual style in this kind of topic (you know, monster-headed depilated bodybuilders with enormous penises... ) Color scheme, and specially the golden accents, make it even more interesting. So nice the contrast between her rosy skin and natural frame and her lover’s unnatural appearance.
But, finally, you’ve achieved an image that could be considered some fetish... but that doesn’t look fetish, but showing a natural foreplay between two lovers, no matter their origin or appearance. Great job.