I remember watching the Myth Busters trying to solve this question but this guy on YouTube does seem to have better logic. I do have to say that being an avid runner that it is a real pleasure to run under the rain. And if you have never done it, you are missing out. At least once in your life you have to go for a jogg while it is hot outside and while you are boiling from exhaustion then have the rain hit you. It’s almost as good as getting laid but with alot less headaches of the after math…
