I think I missed this article from two Decembers ago, about the problem of expanding intestinal gases on planes. (I'm glad to read it's not just my imagination - I had wondered for some time if the reduced cabin air pressure was really enough to cause this. Apparently it is.) I also didn't know that you can buy charcoal filled underpants:
Even so, Rosenberg’s personal feeling is that more could be done – particularly since no smoking policies have made other odours more easily discernible. It may be possible to place charcoal within the seats themselves, he suggests – though previous studies have suggested that is not particularly effective, perhaps because most trousers and skirts create a “tunnel effect” that direct the fumes away from the cushion. Instead, he thinks that airlines would do better to use blankets with charcoal woven into the fabric. For people who are especially worried about their own flatulence, he points out that you can now buy underwear designed along similar principles; the American Journal of Gastroenterology reports that charcoal-lined underwear absorbs nearly 100% of the odour, compared to removable (and reusable) pads placed within trousers, which only absorb about 70%.Somehow, I had previously missed reading about this brand of charcoal filtering underwear, and their rather upmarket looking website You can thank me later...