Purify food and drink keeps meat good and fresh if you cast it on it right? So hear me out. We go around killing all kinds of crazy monsters and... cut off their penises (and probably testicles with it). Take a large syringe of their blood (also keep it fresh with purify food and drink). Sew/seal up the back of the penis so the blood will stay inside, and inject the blood into it to desired firmness. Make collection of rare monster genitals and have a brothel where people come to experience sex like they can get nowhere else, and live their fantasy. Also can sell them to paladins and anyone else who has purify food and drink.