Michael Manning just announced some beautiful new drawings for sale on his website... I love his stuff so much. If you don't know his work, you need to do yourself a favor and check it out. His Hydrophidian and Spider Garden are classic works, just treasures of illustrated fantasy erotica.
I closely studied his style years ago when I was trying to find my own way of inking black and white line art. When you've struggled to master a skill like that for a long time (as I have), it really makes you appreciate someone who has mastered the art. His ability to create these fantasy beings and scenarios is second to none. I would love to live in the world of his imagination for just one day.
The symmetrical piece above reminds me of a drawing I almost purchased a couple of years ago (someone else just barely beat me to it), Conjoint:
5/15 update: looks like both of the works referenced above have been sold! Congrats to Michael Manning, and to the new owners of the original art.