I have a black lab, name's Duke. Here are some recent pictures for reference:
Duke is of course a part of my family, so when I describe my family to my students, I always finish up with him. One day I'm having a late-night BBQ with my students and, as I casually, innocently bite into the skewer of indiscernible meat, I look up and realize that all of my students are looking at me with sly smiles.
"Do you like it, Matt?"
"Yeah, it's good ... what is it?"
And they all laugh together: "It's Duke!"