Exactly. Would a guy turn into a girl if they were thrown into the water? Would there be any (visible) change at all if priest boy was thrown in? It'd be funny if there wasn't lol.
Also, while I wanted to see priest result most, the elf oneechan + water combo has me the most curious. Cause doesn't she already have both parts?
Wouldn't it be funny if, functionally, priest-kun and elf-oneechan are the inverse of each other? With priest looking visibly unchanged but diff underneath and elf looking more masc. But anatomically the same where they care most.