Where do you go?

When I am sitting on a couch, car seat, or any chair that has a cushion and/or fabric, sometimes I let one slip but I make sure to push it deep into the chair. It seems to not only muffle the sound but it also hides the stank. But I learned in high school about the conservation of mass. Basically, it says that mass is never lost. I wonder where these farts go. Maybe to another dimension? It would suck to live in that dimension.