Had a brief discussion with M, my coworker, today. His son, who is in 3rd grade, is learning about animals; specifically, predators. Kids love that stuff, you know. And parasites. They talked about fleas and ticks at school, but M told his son about tapeworms. It took the kid a moment to understand what M was telling him, and then - oh my God.
You know, it's fun to gross out or startle a child like that. Usually it's the other way around with the bathroom humor and all. They think they have it all over their parents for outrageousness. They forget we were once kids, too.
Edward Gorey knew it.