Why did you stay inside?
100 - My bike was stolen
99 - Frostbite scares me
98 - I couldn't find tights that matched my bike
97 - Winter? Why would I leave Florida to ride in Minnesota?
96 - I ride only for the health benefits. My trainer is fine for that, so I don't need to go outside.
I'm sure there are more - why do people not ride in the winter?