https://www.furaffinity.net/view/65188008/

On a trip to the coast, Francine discovered that Bea's head makes an excellent ball. So of course the first thing she decides to do is practice tricks with her girlfriend's noggin. She's actually gotten pretty good at it! Bea is suitably impressed at Francine's skill. And of course, Bea floats, so even if Francine manages to drop her, she won't have to worry about having to retrieve the bat head before she sinks to the bottom.