This in a new Anal animation for the Round Columns: Standing Behind Anal.
This is a new location and has not been used before. It works with all the Round columns you will find in Build mode.
The animation has a few extra details and 2 different movements. It also has animated penis (to avoid Clipping) and Breast and Testicles physics.
For the design of this location I have used the thickest column that comes with the "Get to Work" expansion pack, so for thiner columns there might not be full contact.
Second Movement Preview:

If you find any columns that this does not work and it should, please let me know.