The late 70's BBC comedy, Butterflies, was renamed as Bluebottles in Nigeria. The renaming was necessary to avoid government censorship.
The series was seen as subversive due to Wendy Craig's haircut and the Nigerian government banned it. However, the BBC's roaming agents smuggled the film into the country by virtue of swallowing it, hence the phrase 'butterflies in the stomach'.
With a sufficient doses of John Courage bitter the smuggler would poop thed out and it could then be fed straight into the projector and reeled straight out of the smugglers bottom, the buttocks wiping off any mess as it went.