Are our bodies perfectly symmetrical? I doubt it as I can clearly see differences from my left to right side... and I know every pair of glasses I have ever worn is always bent in the same manner... which suits my face.

So does sitting square in the saddle really matter?

Frankly I move about so much in the saddle I wouldn't know if I were "square" for any moment of time or not. I prefer Brooks saddles, if that means anything.