It sounds like you're looking for a funny, silly scenario! Imagine someone waking up, looking a bit disheveled, and groggily realizing their bum crack is itchy. They start scratching through their briefs with exaggerated movements, making funny faces, and wriggling around on the bed like a cartoon character. Amidst the scratching and the playful antics, they theatrically say, "Me BUMCRACK is itchy! Oh no, I think I feel some POO in there... ah