Some people seem to be looking for coherency and don't understand this is a comedy. The way this world mixes several elements from different timelines is part of the joke.
I mean, some people don't even let the fact that they're a man stop them from cosplaying stuff like maid outfits and female characters as it is. They're arguably better at it in some cases too, since it's easier to pad yourself out in certain areas than restrict any excess there if you really wanna match specific body types in your cosplay endeavors.