One more thought about catching diseases from aquariums. Before aquarium maintenance got to be a science, or at least before I learned much about it, I would clean aquariums by syphoning gunk off the bottom. The latest thing in the 1950s was a see through plastic syphon hose. The most convenient way to start a syphon was, of course, to suck on the hose until the water came over the top of the aquarium. When I was not fast enough, I got a mouth full of aquarium bottom water cooties.

That cootie cocktail was almost a rite of passage for fish keepers of the 1950s. Maybe that's why so many of us have turned into old coots by now. Or maybe it's why we never gave up the aquarium hobby.