During WWII many US Servicemen were stationed in Australia. Locals introduced them to the Aussie drinking custom of “Shouting”. This our way of ensuring everyone gets to pay for his round of drinks by each person in the group paying in turn for the groups’ drinks hence the reminder, “Come on Mate, it is your Shout.”
The Locals considered that the “Yanks” were well paid and could afford to Shout more than the locals could so they invented the game of “CROW”.
They would place the names of local birds on slips of paper into a hat and each would take out a piece of paper. Whoever drew “CROW” had to “SHOUT” the drinks. Needless to say it was always the lone yank in the group who drew “CROW” and thus buying the group drinks.
The locals would pat the Yank on the shoulder with declarations of how lucky he was at always drawing “CROW”. 
(The only name written on all the slips of paper was the name “CROW”.)
When the Local drew his paper out he would declare his bad luck 
by naming another bird other than “CROW”.
Of Course the “Victim” never got to see all of the papers in the hat. 
The Aussies at the time referred to the US Servicemen as: “Overpaid, Over Sexed and Over Here.” but always liked the “Guys” and respected their contribution to the Salvation of the Aussie Mainland from invasion by the Japs even though they duped them into paying for more “Shouts” then was their share.
