Black Aussie Humour
When comforting someone who is dying of cancer, it probably isn't tactful to joke about how much one is enjoying a mini-series, but such black humour is one of the most notable aspects of Australian comedy. For example, when a serial killer kidnapped backpackers and buried their bodies in the Belangalo State Forest, a hardware shop in Moss Vale (near the forest) began selling souvenir shovels with the letters 'B.S.F' engraved upon them.
Similarly, when seven bodies where discovered decomposing in barrels of acid in the country town of Snowtown, the town's stores began selling souvenir coffee mugs with captions such as "come to Snowtown, you'll have a barrel of a time." Finally, when Prime Minister Harold Holt went for a swim at a Portsea beach and was never seen again, construction soon began on the Harold Holt Memorial Swimming Pool.
Psychologists have offered two different explanations for the origins of black humour. The first is 'incongruity theory.' Incongruence is caused when someone experiences conflicting motivations after being presented with disparate ideas. For example, if someone wants to like Australians but also believes one should respect the dead, they will have conflicting motivations about the Snowtown souvenir mugs. This attitude incongruence may cause one of the attitudes to 'give'. For example, they may decide they don't like Australians anymore or decide they don't care about disrespecting the dead. If attitude change is not a desirable outcome, the person may just laugh and then move on.
The second theory is a 'catharsis release'. Freudian psychologists believe that humour allows people to release tension associated with difficult experiences. This helps them address those issues that they can not openly discuss. For example in the Convict era, Convict etiquette demanded suffering in silence whilst the law considered complaints as insolence and punished it with flogging. As both Convict etiquette and the law prevented the Convicts from discussing their emotional distress, they were forced to make jokes to deal with their emotional turmoil.
The same kind of needs are still expressed today. When Australian comic Bill Leak found out that his mate had lost his right-big toe in an accident, Leak had confused emotions. Although he could have sent flowers and a get well card, instead he sent a thong with big toe attached in the appropriate position and a note: 'Glue here.'
http://www.convictcreations.com/culture/comedy.htm