Oh, ok, that makes way more sense. Plus, it's sort of obvious since the word Boyhole is used to describe his asshole. I was however thrown-off because the Futa/Herm/Trans tag is used on his ToA Art H-Foundry posts, but not the Male Nudity one.
Thanks for responding, I sent an email around a week ago so I posted about it here since I got no response. If I have any more questions to ask in future, I'll be sure to post them here instead!