Little Johnny was sitting in the gutter one day playing with some sulphuric acid. Along comes a priest and says "Little Johnny do not play with sulphuric acid it is dangerous. I will trade you my holy water water for that acid". Little Johnny goes "And what does your holy water do that my sulphuric acid can't?" The priest replies.. "Well Little Johnny just last week I rubbed some holy water on a pregnant womans tummy and she passed a 9 pound baby boy" "Is that all.." says Little Johnny..and he continues "I dab some sulphuric acid on a frogs ass and it can pass a mercedies".