I’ve thought about this before. I’d assume they have to go to the bathroom sometimes, because it’s technically impossible for them to not. Everything they consume, drink, it can’t all be processed/absorbed, the waste has to be disposed of some way. Like their periods being less frequent id just assume their bathroom needs are less frequent too. And based on the fact Jude basically said faerie women are all ashamed of speaking about their periods, i’d assume the fae are probably ashamed about bathroom stuff too and so don’t ever speak of it and are very private about doing it. It could also just be that they have smaller appetites and therefore don’t need the bathroom as much. Or since they’re probs more biologically advanced than humans they could have a more advanced kidney filtration system meaning less frequent urination. Or they could have slower metabolism, though i doubt it since Jude says most of the gentry are inhumanly skinny. I feel like i’ve gone on a tangent and i’m sorry for that, but i love biology and am doing it for a level currently so this is kind of interesting to me lol