Moona.
You must understand, either by training or natural capability, able to swiftly and comfortably deliver the gigantic toilet clogging indo-girl shits that she puts out on a regular basis.
The great wealth of food intake that sustains her voluptuous ass, hips and titties is rapidly processed and formed into the largest, most dense logs.
Moona's asshole is a biological marvel. It is likely that it would adapt to the function of pleasure within moments, wrapping itself around your cock as the walls of her sphincter massage and milk your whole length as you thrust against moona's massive rippling cheeks. Her ass may well become self lubricating.
The fact of the matter is, anal sex with moona would ruin you for all other sex and you would die a broken man, unable to live without moona's divine dumphole.