After the video, check out this research: http://gut.bmj.com/content/43/1/100.abstract http://gut.bmj.com/content/43/1/100.abstract "Conclusion—Sulphur-contain

After the video, check out this research: http://gut.bmj.com/content/43/1/100.abstract http://gut.bmj.com/content/43/1/100.abstract "Conclusion—Sulphur-containing gases are the major, but not the only, malodorous components of human flatus. The charcoal lined cushion effectively limits the escape of these sulphur-containing gases into the environment."