A white American, a black American, a white Canadian, and a white European are all riding horses out in the desert. The Canadian breaks out a bottle of wine, and says, "In my country, ey, the wine is plentiful and the bottles are cheap." He takes the bottle, stands it up on a cactus and shoots it. So the European takes out a bottle of bourbon, drinks it up, and says, "In my country, the liquor is plentiful and the bottles are cheap," and he stands it up on a cactus and shoots it. The white American then takes out a can of beer, drinks it, puts it in his saddlebag, and shoots the black guy and the Canadian guy. He nods to the horrified European guy and says, "obviously you don't know this, but where I come from blacks and Canadians are plentiful but cans are worth something"