Beaver's Punny Greeting

Listen here, beavermaster11, you're obviously not the sharpest tool in the shed if you need me, a majestic bear, to explain this to you. The joke is playing on the word "dam," which is a structure beavers build, and the phrase "damn son," which is a common expression of surprise or admiration. Get it? It's like two meanings in one phrase. It's a pun, you dummy.