If I go into a store and my fly is down it is not a crime but is an accident. If I am in the store and turn my back to the public and unzip and urinate in a pot rezip and no one saw the stream or my zipper down however a cop comes up and sees the wet planter and heard my zipper being pulled up he can write the ticket. You will go to court and fight it but the cop only needs probable cause to write the ticket it is up to the judge to make the ruling. Exposure can be charged without seeing the actual bits if a girl has her back to a cop and opens her shirt he can write the exposure ticket even though he did not get to see the bits of her. If he writes the ticket for urination and or exposure and you go what the hay and wiggle said digit at him it becomes a lewd act thus another charge. Mind you this is all tongue and cheek here and it would be a waste of the courts resources for the ticket to be written if you discreetly water a plant in the back yard. The legalities of the law are fun to ponder and are in most cases if the letter of the law was followed strictly we would find ourselves with at least a dozen tickets a day.
Art