Moral to a story

Have you ever been thinking about an answer to the question and never really got the answer until someone else said it, and then you’re like “duh, I knew that”. My family has a saying for when something like that happens. It is “Who built the beaver dam”? This all come from my mom was little and when my grandpa came back one day from looking the cows over in the pasture. Well there was not a lot of water running from the top of the river and that was because the beavers had built some dams. When my grandpa got back from the river, he was cussing out the dams. My mom’s aunt asks “Well who built the beaver dam”? From what the story goes everybody just stops and looks at her like if she seriously asked that question. My aunt not realizing what happened, say innocently “The beaver.” The moral to the story is the answer is a simple as a beaver and not to look too hard for it.