So since it's been cold, When i come in my house, I leave my coat on till i go back outside. I sat down with my g maw to watch TV and she tells me to take off my coat. I explained i would like to keep it on. And then i was informed thats how you catch a cold. In matter of fact when you wear you coat inside and then go outside the coat doesn't work any more! Can any one spread some more light on this?