Spoiler File
(7.8MB, 2894x4093) Reverse >>4387
>>4398
He obviously means that onahole is to protect her ass from horny youkai, not that she's a futa.
Marisa is the last toe hoe to ever, be a futa, right after every other human other than Reimu (and even Reimu is a masochistic bitch futa that acts cocky with youkai but gets her borrowed balls gappened 4 times a day).