Nipple #1
You have found three primitive conceptual .gif animations that led to the creation of the stop-motion shorts, "Zugskin" and "Tephrasect":
Zugskin
.gif animation concepts:
Tephrasect
Ejaculating a Grubworm Before Shaving
Girl with a Saw-Tooth Hula-Hoop
Being Eaten Alive by Ants in a Bathtub