An ass for the ages 9

Having cracked open (so to speak) the matter of Dave Lash's anal erotomania in the eighth post in this series, I think it's now time to explore the hole story. So let's start with this shot, done at the same time as his famous posing video ("Flex Appeal") but not, alas, part of the actual footage.
(However, the footage that keeps running in our heads is, of course, the best action of all.)