Anon encounters a reimu and some koyukkuris. Koyukkuris hide in the reimu's mouth. The reimu taunts anon about how he can't hut the little ones now, as per usual. Anon tapes the reimu's mouth shut. The koyukkuris drown. Happy End.
Makes one wonder if they only assume it works in theory but never tried it and the only time they try it it backfires for obvious reasons.
Because let's use a bit of common sense, unless it is against a single mouse or smaller creature, i doubt this method of defense would ever work even against animals of their same size, or a group of them.
Hmm well considering they remain in place, i think the point is that they mistakenly believe their bodies are though enough against anything as big or many times bigger than them, not realizing how pathetically weak they are or how such "cub defense mechanismn" is destined to always fail against anything that isn't small and alone.