Even fleas had to be married before babies could be shown, thanks to censorship at the time.
As this is a flea circus, patrons are given magnifying glasses rather than opera glasses.
Francois performs a gesture attributed to Sir Walter Raleigh, who placed his cloak over a puddle to keep Queen Elizabeth from getting mud on her shoes.
The dancing flea extravaganza is likely a nod to similar ones produced by the great Busby Berkeley in the 1930's.
The voice of Fifi Le Flea (voiced by Francoise Brun-Cottan) sounds very much like Nibbles and Tuffy who appeared in four Tom & Jerry cartoons (also voiced by him). The Tom & Jerry cartoons are: Royal Cat Nap (1958), Tom and Chérie (1955), Touché, Pussy Cat! (1954), and The Two Mouseketeers (1952).