"Is there anything more peaceful than the sound of a thunderstorm?"
Dude, they actually used to sell the sound of thunderstorms on those relaxer tapes, which you would play to unwind and stuff!
I used to listen to relaxer tapes back in the day, but not any more. Heck, tapes don't even exist any more, and even cds are pretty much finished now.
I do remember that there was one tape that was considered MORE relaxing than the sound of distant thunderstorms: it was the sound of Ocean Waves.
Since the human body is 60 percent water, I'd guess that is why we love water so much lol.
I've seen some YouTube videos that have thunderstorms to relax you.
I still think those things are pretty cool.