I’ve often been baffled by hair spray naming conventions. Instead of a nice linear sequence – 1, 2, 3, 4, 5, say – the choices usually amount to the following: extra hold, maximum hold, ultra hold, mega hold, double-plus hold. Which one’s hold is strongest? Which one is least likely to leave someone’s hair floppy on retro ’80s night? Oddly, the seasonal world of egg nog isn’t all that different.