Trivial Trivia

Speaking of flea markets... when I was a kid flea circuses used to confound me.  I'd read about them in Archie comics and I knew, just KNEW that you couldn't possibly train fleas and put them in a circus, but still.... why would there be such a thing called a FLEA circus if it didn't have fleas in it.  How did that work??  So I pondered for years silently not daring to ask anyone, lest I be mocked.  I eventually worked it out though, eventually...  Specially bred fleas, right?