I made a massive pot of lentil / bean / sausage / chorizo / tomato stew on Tuesday night, and have had it for dinner the last two nights. I've had to freeze the remainder for another time, because my gaseous emissions are already of epic proportions.
This has led me to research my trauma here: http://en.wikipedia.org/wiki/Flatulence
It's quite interesting, but I also enjoy the descriptions given in an authoratitive and scientific tone..
"Among humans, flatulence occasionally happens accidentally, such as incidentally to coughing or sneezing or during orgasm; on other occasions, flatulence can be voluntarily elicited by tensing the rectum or "bearing down" on stomach or bowel muscles and subsequently relaxing the anal sphincter, resulting in the expulsion of a flatus."
:D :D :D