You know, Timmy, this is exactly the type of thread to drag me out of my post-Yosemite lurkerdom.  But farting (unlike poo) is actually kind of a sensitive topic for me.  I have digestive issues, man, and my flatulence is unrivaled by any man, woman, or canine.  I'm not trying to brag, just I don't know.... maybe start a support group or something.  I've been thinking about getting a regular colonic to see if that helps.