Fleas were animals native to Earth commonly found on dogs, (TV: The Two Doctors) and in "a beggar's robes". (TV: The Masque of Mandragora) According to the Eleventh Doctor, even educated fleas "do it". (TV: Hide)
Behind the scenes Edit
This is a reference to Ella Fitzgerald's "Let's Do it, Let's Fall in Love":
- Birds do it, bees do it. Even educated fleas do it. Let's do it. Let's fall in love.
Ad blocker interference detected!
Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers
Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.