Wrapping Bottle With A Newspaper

I saw a black guy who was drinking a bottle of beer at a pub and he wrapped the bottle with a magazine. So this guy and his beer put in mind me someone who wraps beer with newspaper.

I asked him about the reason of the wrapping. He answered me that the beer was too cold. As I said he was a black guy. When I asked him country, he said he is from Rwanda.

We know that African people can feel cold easily because his bodies are used to warm weather.