He's Dove, and Dove's Dad joke is pretending to be confused as to why the Dad jokes don't each have a Dad as the subject of the joke (i.e. A dad & a mushroom walk into a bar, the mushroom is refused service, the dad says to the bartender; "C'mon he's a fun guy")
So there was this man whose name was Juan and he got shipped off to war when he was young. When he came back from the war he felt rather sad and despondent so he decided to fulfill a dream of his and become a professional clam fisher. Well every morning he would go out fishing and in the afternoon he would sell them at his clam shop. Over time his business became more and more popular, so Juan decided to hire this otter that would go out and catch clams for him. One day Juan got a call from an old business partner of his, saying how he wanted to become partners again, but he would have to ditch the otter. To which Juan replied, "sorry, you can't have Juan without the otter."