I'm partway through writing a tune for guitar which is quite twisted - some bits are nice and symmetrical, and others are seriously asymmetric. So it's called Air Symmetric. But the better answer is "because it is" - the name came to mind, and to me it was so clearly the name of the tune that trying to explain it seemed banal. I've got a fiddle tune which is as yet unnamed - I'm just waiting for a similar stroke of lightning to name that one.

Graham.