My argument is that we first evolved to sweat, not wear the skins of dead animals. I'll always be more comfortable dripping in a humid summer heat (moisture feels so natural on the skin) than in shivering for warmth. Watching the cold, dry air of winter suck the energy out of my breath is a reminder that I'm out of equilibrium with my surroundings (more so than normal, anyway), and that the universe seeks to rectify this. Cold is bitter and like death.

I enjoy running in the baking heat, soaking in the sun. My lungs don't get seared from the biting cold, and I can breathe. The feeling of evaporating sweat is glorious and invigorating; the shirt is optional.

I appreciate your personal opinion and experience, though. :)