Progress in Research: Chapter Four, Page Seventeen

Progress in Research: Chapter Four, Page Fifteen
Progress in Research: Chapter Four, Page Eighteen

And onward.

Larry and Kareem proceed to anal intercourse.

(Click on the image for larger size. Creative Commons License
Progress in Research: Chapter Four, Page Seventeen written and commissioned by Dr. Faustus of EroticMadScience.com and drawn by Lon Ryden is published under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License.)

The piece of erotica that popped into my mind as I was posting:

Found at the tumblr si-jones.