Turns out the postman has a better sense of humour than some may think. 
For decades the folk at Australia Post have been using the wonderful variety of Australian suburb names to complement new stamp issues on special collector envelopes.   
When they released a series of native flower stamps in 2003, which post mark did they use? Flowerpot, Tasmania, of course. What about the special series on Australia's ocean animals? Deepwater, NSW. And a 2009 series of stamp about iconic Australian dessert dishes? Eaton, WA. Christmas stamps often get a Merrylands or St Marys postmark. Even philatelists like a pun. 
This humour has been going undetected by everyone but avid stamp collectors for 25 years. 
"In 1990, the practice began of choosing a location for the [first day issue] postmark that is obviously connected to the stamp theme. Sometimes, this involves choosing locations with word associations to the stamp themes, which often results in a "pun". For example, the first Australian self-adhesive stamp issued on 16   May 1990 had a FDI postmark of Gumly Gumly, NSW," a spokeswoman said. 
In 1970, Australia Post started designing envelopes to match new stamp issues and these were sold to collectors, but stamped at their local post office with an ordinary postmark. Then in 1986, it developed a pictorial postmark to match the new stamp issue, which was stamped straight onto the envelope during manufacture. 
"For quite some time now, it has been our usual practice to choose humorous word associations for FDI postmarks. The selection of FDI postmark locations are made by the Philatelic Group," she added. 
And it turns out the Philatelic Group has been having quite a lot of fun deciding which postmark to use. 
This jolliness was uncovered by stamp-collecting blogger, the Punk Philatelist, who was delighted at how clever Australia Post has been at matching stamps with suburbs, because "you never know which two-horse town might receive this national honour".
"The good people at Australia Post must have thought all their wishes had come true when they hit on Fairy Meadow for the Mythical Creatures issue. And wasn't Valentine handy for this year's adorable Love is in the Air release?"  
So let's play along. What suburbs would you use for bicycles? Hot-air balloons? The Queen's birthday? Medical doctors? 
That would be Ryde, NSW, Ayr, QLD, Royal Park, SA, and Healesville, VIC.