Well since acne sufferers tend to represent a minority of the population it makes sense that there's a huge number of people who aren't acne prone. Science has more or less concluded that diet does not cause acne; it only aggravates it in those that have acne-prone skin. Basically I think it comes down to genetic make-up. Those 3 to 400 have not the predisposition for acne and thus, have normal skin like so many people I see.

hmmm i definitely dont think acne sufferers are a minority, i see tons of people with acne at school, a lot of them even worse than mine. but fb pictures are misleading haha unless they were taken with super high quality cameras they dont really catch all the details in a persons skin. no one has completely flawless skin 24/7

A lot of people do have clear skin, but please trust me, you CANNOT believe what you see in photos on the internet! Makeup or not! For years I have been using Photoshop to perfect/airbrush all of my photos. I have openly admitted this, but that doesn't mean there aren't tons of girls doing the same thing who do not admit it.