>>53701115Lillie is cute and sweet, which creates the illusion that she's perfect and doesn't do such things. Even though everyone knows logically that she does. She enjoys being perceived as beautiful and attractive, so imagine how devastating it would be if a bully took a photo of her using the toilet at school.
It's not like a secret has been exposed, everyone already knew she was human and had to do it. But the crude exposure of the act, breaking down the social barriers that compel people not to talk about it too much, would humiliate the fuck out of Lillie and make her become a hikikomori, crying every day because everyone at school is making fun of her and distributing her photo!
Lillie is not ashamed of being human and shitting, she's ashamed of her bodily functions being exposed so crudely and talked about in public, because they shatter the illusion of perfection girls attempt to project to the world.
Same reason May wouldn't let you enter her dirty room full of sweaty socks and dirty clothes all over the floor. Is she ashamed of being human and producing sweat? No, but she has modesty and is ashamed of it being exposed so crudely. She would rather nobody bring that up because it's embarrassing.
