Did you know they sell such a thing as "fart spray".
I kid you NOT.

How do I know that you ask

. I have sons.
One summer my younger son and his friend thought it was the most hilarious thing on earth to go into the campground bathroom and make fart sounds and spray this. They would laugh their butts off watching people finish their "business" and run out of there..totally disgusted.

Then one day they met a REALLY big guy, who didn't appreciate their idea of fun.

They went running for their lives! (but they didn't loose the can of fart spray)
I had to remind Mr. Funny guy, that while he was spraying that stuff, he wasn't just stinking up the bathroom...He WREAKED. We made him strip naked before we let him back into the camper.
Boys..ya gotta love 'em!