Ok. That's just almost all pictures have been edited. It's easy to see that people want to make their profile pictures looks beautiful (noted that all profile pictures are good-looking). The reason is the same as why people choose good-looking pictures: they want to show the best of themselves, though some of the profile pictures no longer present the true selves of picture owners. People just want to give other people a good impression.

6. How many people's profile pictures are their idols?

-10