“The next time you’re in a public event, such as a lecture, play, or ballgame, look at everyone’s body posture. People who are disengaged are usually leaning back, resting comfortably on both butt cheeks. It’s only when they really get into it that they begin leaning forward, putting all of their weight on a single cheek.” — Copyblogger
Jonathan Morrow explains why this is significant for bloggers. If you’re not a blogger you can skip his post. I just wanted to post the paragraph above. For the record, I’m usually a one butt check kind of guy.