Whenever you are on the can and grab a couplesheets of toilet paper and cup it over your butthole to filter the sounds of your erupting bowel movements.
Are your walls paper thin? Afraid your roomates or your significant other with hear your compressed explosions? Then use the fart-filter method.
A rather sexual fetish in which a very small cabal of goofy disgusting losers with nothing else better to do but watch a woman passing gas over a cake and masturbate to it enthusiastically. So sick and perverted, that even sexologist Dan Savage came out against it in his weekly column.
Danielle:I am into Fart Fetishism so much I have just farted on a cake.
John: Oh, well, it seems like you have a rather strong case of Fart Fetishism.