Purpose of a Profile Picture

I really like the analysis you put into your work. You really brought out the relationship between the profile pictures and the person. All your claims were interesting, but maybe bring out more evidence to support it. For example, a lot of the claims were your own opinion, so maybe bring in a some friends to analyze the photos with you to get a bigger sample.

The structure is quite clear. Table is very well explained. But "show off" is not the only purpose that people post something. Social media is a platform where people meet each other and tell them what is happening around them. Some people do post sad experiences, but rarely someone will use a sad face as a profile photo. People's emotions are changing every day, but no one will change their profile photo every day. They use a happy and attractive face to express a general emotion. "We should all be optimistic to lives." Sometimes people just want to share something through facebook, but not on the purpose of showing off.