I heard this claim a few years ago when I first starting going to college, studying photography and composition, the rule of thirds, etc etc etc etc......
At the time I just accepted it as a fun fact and filed it away in my brain with the other information that I accept as "true without need for evidence". And that was that for a long time. Sure, every so often I'd see a pretty girl and notice her symmetry, or see an actor and notice his.
But then I started to do some reading into The Golden Ratio last year after my friend mentioned it. Even though I was familiar with it and its "mathematical symmetry" from an algebra class years past, I was intrigued. So I looked into its real-world examples and noticed that almost every single thing that looks "good" is built upon the Ratio. For instance, the best photographs are composed with different objects in the foreground and background aligning to the Ratio within the frame.
It's pretty interesting stuff if you want to look into it, just check out a mathematics encyclopedia, or even wikipedia, and you'll get an idea of how practical it is. It ain't called "The Divine Proportion" for nothin. Hyuck.
PS - I like how Sass' pic is photoshopped. lolz
Jam it back in, in the dark.