As an example we can take a song from last week's Now Show on BBC 4. It was Mitch Benn who started off with a classical "serious" introduction mentioning the author Arthur C. Clark and a recent finding that there is methane on the planet HD 189733b, which is 63 million light years away.
He then starts singing with an introduction about watching the stars - a theme that has been around for thousands of years. Only at the fourth line comes a slightly hidden reference to what clearly will be the theme of the song.
We cast our eyes out to the stars
Lose dodgy home made probes on Mars.
Who would imagine, who could tell,
the first sign of life would be a smell?
Note that the reference is not in clear. The same message could have been given in much more explicit words, but to keep the tension, it is only the very last word that hints at what will come: smell.
Then comes a stanza where the message is very blunt. It is reasonable to assume that man has laughed at flatulence for ten thousand years, and conceivably hundreds of thousand years. A studio audience of 2008 is still bound to laugh at the mere mention of the word "fart" - something that triggers certain emotions in most us, be they laughter or disgust.
Something's farting way out there in space
Are they friendly, are they hostile?
search your heart and search your nostrils.
To further play on the motive of emotions, the listener is asked to "search his heart" and then in an anaphora also his nostrils. Asking the listener to search his heart, his emotions, is a theme that catches our attention, and it certainly has done so for thousands of years.
Something farting in some far off place
And they left a trace behind
a close encounter of the whiffy kind
Again, the "far off place" evokes the distant unknown. During the neolithic it may have been the next valley. For Moses the promised land. For Columbus India, and for Neil Armstrong the moon. To all of us, there is some distant place where we have not yet been.
The reference to a "close encounter of the whiffy kind" uses the ancient method to create a bond between singer and audience by referring to common knowledge. In this case, it is of course a reference to the Steven Spielberg film from 1977 with a title alluding to a close encounter of the "third" kind. (For those who have forgotten, according to dr. Josef Allen Hynek, an encounter with aliens of the first kind is sighting. An encounter of the second kind is one with evidence for the encounter. An encounter of the third kind is contact. Dr. Hynek did not comment on whiffy encounters, as far as I can tell.)
The next stanza is probably the weakest one, and it does not follow known narrative archetypes very much. The mention of a distant place is just a repetition. The "gas giants" do not refer to any known mythical organism, and it does not clearly define the nature of such an organism. The stanza is probably perceived by most as a far fetched attempt to get more out of the gas theme without actually adding much of a message.
Something's farting way out there in space
it's hitherto unknown to science
someone's letting off gas giants.
The final stanza evokes an imaginary reality - a "what if" statement, just like man has probably done for thousands of years. Here Mitch Benn launches the thought that aliens may use olfaction as a major method of communication. It is of course far fetched, as smell does not transport very quickly over large distances. But it is nevertheless a possible means of communication for beings who stay close, like insects using hormones to call each other's attention. Even humans use hormones for sexual communication, but we are usually unable to consciously recognise the smell of hormones, even though we subconsciously use the information when selecting our partners.
Something's farting at the human race,
but we mustn't get irate.
It might just be how they communicate.

Ironically the whole theme of the song is incorrect. Methane is a gas that does not constitute a major part of flatulent gases, and it is in fact odourless. A fairly big part of the methane in the atmosphere admittedly comes from mammal flatulence, but most of the emitted gas in a flatus is nitrogen. The smell of flatulence mostly comes from sulphuric compounds, skatole and indole.
Factual accuracy is of course not needed in order for a fictional work to be appreciated. The lack of factual accuracy is very likely also a fictional theme that is thousands of years old.



