Yes, I am an enthusiastic person, willing to try lotsa things, and say "yes" to many many requests. Like, for example: "Sure, I'll bike 100 miles for Susan Nelson's fight against cancer." But I do believe in a certain level of preparedness for things, and like a well-trained mom, 90% of the preparation involves wearing wool.
Why was I so joyous on Sunday? I was wearing my three, no, four favorite garments: an incredibly soft and warm lambswool sweater (turtle-ish neck, 1/4 zip, from Brooks Brothers, believe it or not), my 1952 (manufacture date is on the label!) Australian Army wool pants (5-pocket; I often roll them into knickers for bike riding), and Smartwool knee socks.
Also knicker tights under the pants, an Under Armor undershirt under the sweater, my team jersey over it, glove liners and fleece mittens, and, what the smart people do: plastic bags twixt my socks and shoes, adding warmth without cutting off circulation. All the people who snickered beforehand were the ones seeking out a warm engine block to put their toes on afterwards.