You have the plumber in. And offer him a cup of tea. All your mugs are dirty except for ones that have “Follow Your Dreams” or “Love You To The Moon” written on them or the one with a moustache picture. Which do you use?
Follow your Dreams for sure
My father had a young student (14?) that loved to listen to water running through pipes. He became an extremely good plumber. And after re-visiting our house 40 years later he remembered such things as the brand of the dish washer we had there 40 years ago, where an old pipe had been, where an old fan had been and the color of it (all gone). I suspect he has photographic memory. He also remember the altitude and latitude on basically every city in the world. And he loves his work as a plumber. How can one get tired of fluid dynamics! You should know!