A childhood belief about hymns

Back when I was about two or three years old (old enough to know a word but not know what it means), I attended Sunday School. Anyway, one of the highlights of the year was giving a little concert for our parents when we sang the Bible songs we learned. On one occasion, a song in the class's repertoire was about David and Goliath (For those who are unfamiliar with the story, it's about a shepherd boy who kills a giant with a slingshot.) The last line goes "And the giant came tumbling down," but I heard it wrong. Imagine the shock on my teacher's face when at rehearsal, she heard me sing "And vaginas came tumbling down." I almost got kicked out of Sunday school! Luckily, I learned the lyrics right.