Vanilla is a product of Lussumo:
Documentation and Support.

According to animation lore, this six-minute short was made for Little Nemo in Slumberland cartoonist (and Gertie the Dinosaur animator) Winsor McCay's birthday party circa 1928-1929.
The first porno-cartoon was made in New York. It was called "Eveready Harton" and was made in the late 20's, silent, of course-by three studios. Each one did a section of it without telling the other studios what they were doing. Studio A finished the first part and gave the last drawing to Studio B [...] Involved were Max Fleischer, Paul Terry and the Mutt and Jeff studio. They didn't see the finished product till the night of the big show. A couple of guys who were there tell me the laughter almost blew the top off the hotel where they were screening it.