Pretty hot to find a woman willing to do this. But I think the best way to get best results. Is 6 or so mentos deep in her asshole. Then find a big culinary syringe that can hold at least 16oz . Then insert syringe and push the whole 16oz in as fast as possible. And I'm sure it will come out twice as fast
Idk what is nastier. The amount of mold growing around that tub or the yeast infection she's about to endure after that grade A pussy trick. Throw a ping point ball in there and you got yourself a little cunt cannon.