Picture from “Tome of ponut: extras” artpack, all ponutpacks can be downloaded (with optional donation) at http://mittsies.com/ponutpacks.html
 
There are 3 sets - one with dirty scat, second with watersports only, and the third without bathroom fetishes. You can view any particular set by clicking on one of the comic:*** tags ( “comic:depraved harmony”, “comic:liquid harmony”, “comic:clean harmony” ) . When comic frame is opened at derpibooru after tag clicking, keys ‘j’ and ‘k’ or buttons at top are useful to list frames forward/backward.
 
 
All pics have futa version of every pic from this set, but I had put only two futa pics at derpibooru, to don’t clog my artist tag with additional dozens of versions. You can download the art pack with all version and other artists works at given URL.