I just did a guest post called "Is Symmetry Important?"over at Paul Ingraham's excellent site PainScience.com. You may remember Paul from one of his several well-written posts at this blog, including "Quite a Stretch" and the provocatively titled "Bamboo Cage." Anyway, the basic idea in my article is that many body minded folks sometime get a a little obsessive and neurotic about trying to make the right side of their body be the exact mirror of the left. But we don't have two hearts, and we don't need two right arms either. Read about it here.