The thing that makes this absurd, and brilliant, is that the weapons don't work. Any pervert could've come up with using women's crotches as weapons of war, but they would have made it so that they shoot powerful piss beams and destructive poop bombs, meaning that there's an in-world rationale for using them... Kago's much too sensible for that; obviously they wouldn't work as weapons, so all the participants have to consciously act out the effects and pretend that they're shooting and blowing each other up. That refusal to commit to his own bit is delightful; it's like Kago's showing us that he's a weird pervert and nobody, including his own characters, is actually buying into his weirdness- they're just forced to be actors in his absurd theater.