that is actualy a type of fetish porn. its actualy very popular. its better if the girl has diarrhia though. then she can spead it all over and when your done with the *bleep*ing its time to shower together.
yes. my girlfriend did this. just wear tight panties and tight pants (not jeans) and eat a creamy bean and cheese pasta and then the next day eat a can of beans(in molasses not tomato sauce) then fart.
the reason it worked for her is probably becouse she has IBS( Irritable Bowel Syndrom). so it might not work for some people.