I worked in a kitchen once with a guy who let 'em rip all the time. The first time, I reacted negatively, but he said "It's okay, my farts don't smell." WTF? He was completely serious. There was no smell. We worked together a couple of years, hung out together after work and everything, and during that entire time, he might let one loose once in a while, but there was never any odor. Weird as hell.