Despite my rapidly encroaching thirtyness (just a few weeks away for those planning to buy me fantastic presents) I'm the fittest I've ever been. When I walk, mountains roll swiftly beneath my toned legs, in the gym, no machine can withstand the muscle-packed onslaught of my mighty limbs. Breathing, I inflate to Arnie-like proportions as air fills my efficient lungs and oxygen energises my powerful heart. Of course you wouldn't be able to tell any of this by looking at me, my body-shape takes little notice of my cardiovascular strength. As a result I stood quaking before the wardrobe on Friday evening and prepared for the toughest of all body yardsticks - could I still fit into my dinner jacket for the Christmas party? The dinner jacket is older than me, a gift from my father when I started University. It's hewn from thick, unyielding material that causes indigestion and stomach cramps in a trice if my waistline has expanded beyond the confines of the trousers. I u...