Rock star

Bob likes rocks. Bob likes water. Bob’s favourite thing to do in the whole world is to fish rocks out of water and carry them up the beach where they get a quick chew (I get terrified for his teeth…) and then it’s back into the sea for more. This causes such great joy that it can bring on an uncontrollable urge to “sing”…
If you want to clear a beach of bathers, just add a singing Bob!