I lubricate brake and shifter cables. Some come pre-lubricated, which is better, but riding in wet and especially in cold conditions my cables tend to get really sluggish at some point and some lube helps. I think I heard that some cables come with a lining that doesn't like being lubed, the more experienced mechanics here will know.
Winter riding is much less about badassery and much more about bundle-uppery. - malkin
1995 Kona Cinder Cone commuterFrankenbike/Selle Italia SLR Lady Gel Flow
2008 white Nakamura Summit Custom mtb/Terry Falcon X
2000 Schwinn Fastback Comp road bike/Specialized Jett