Elfs ranking your cock after you got isekaid

You just got isekaid to a random world, waking up in a city full of elves. Since the birthrate and sexualdrive of the elven males was so low, every possible candidate of the humans got send to the high royal elven female court to have their penis ranked. Based on how big and build their penis is, they get join a special ritual to claim their societys ranked while being naturalized.