Self tail insertion/masturbation. Mostly for dragons, but can also be used for lamias, lizard-girls, cat-girls, dog-girls, slime-girls, ghost-girls, harpies, plant-girls, etc.

Hit chance is still somewhat sketchy, only about 50% for non-dragons, and about 70% for dragons, dependent on what kind of posing you do.

While functional in base Illustrious v2, I would recommend a model that handles furry/scalie content better such as PerfectIllustrious or YiffInHell.