Rain, rain… go away. Come back again some other day.
I don’t recall what the name of the show was, but years ago I watched some random cartoon on PBS about a group of kids where one of them was turned into a gargoyle and he could only speak when water poured from his mouth. That was the first instance I can recall of hearing of “gargoyle speak”.
I thought it was a neat affectation for any species. Hence the nature of today’s joke.
Also, ever since the cancellation of Disney’s Gargoyles your everyday gargoyle is starved for attention it would seem.