The sourcing of a fart involves a ritual of assignment that sometimes takes the form of a rhyming game. The trick is to pin the blame on someone else, often by means of deception, or using a back and forth rhyming game that includes phrases such as:
* He who observed it served it.
* He who first ejected it detected it.
* Whoever rhymed it crimed it.
* Whoever spoke last set off the blast.
* Whoever smelt it, dealt it.
* Whoever denied it supplied it.
* The next person who speaks is the person who reeks.
* The smeller's the feller.
* Who sat on a duck?
* The one who said the verse just made the atmosphere worse.
* He who accuses blew the fuses.
* The first chicken that cackles, laid the egg.
And in some cases, blame was laid upon either the dog or the cat.