When it rains why do some people feel good?

Tweet

I don't know the real reason behind this feeling, right now it's raining outside. and it feels so good... it's as if I've got no problems at all~ I'm all free to think, think and think without worrying about something. My fave part is when i think about my childhood memories, you'll often see me at the window when it rains- smiling and watching every droplet =) geez, sentimental? Is there really something when it rains?