Urine, fake money — international sports have it all!

Consider this your sports etiquette tip of the day.

It is perfectly acceptable to throw a stack of fake money at FIFA president Sepp Blatter, as a comedian did in protest Monday at a news conference.

It is not OK to throw a cup of urine at Tour de France leader Chris Froome, as the cyclist said someone did to him Saturday.

The more cynical among you might say that everybody’s a cheater and thus worthy of any kind of shower. But Blatter is so brazenly obstinate in the face of a mountain of corruption that he deserves whatever he gets. The photo of Blatter in the middle of cascading fake cash might be the greatest image ever in the history of soccer.

Froome has been the subject of repeated doping accusations during the Tour. He says he’s clean. It’s hard to find sympathy for anyone in a sport that, for the longest time, was as much chemistry class as athletic event. When Lance Armstrong turned out to be the cheater of all cheaters, he left rubble in his wake in terms of cycling and public trust.

I have no idea if Froome is a cheater, but Saturday’s alleged incident crossed a line. Throwing urine on someone is the No. 1 sin. The only thing worse would be No. 2.