Will Ferrell doesn't know why he used to be embarrassed about his real name. We asked a clinical psychologist for her take on it.

• Will Ferrell said it was "excruciating" to be called "John" on the first week of school. 
• The "Barbie" actor added that he did not know why he felt embarrassed. 
• A psychologist weighs in on why names can cause insecurities. 

The first day of school is never easy. It was especially awkward for Will Ferrell, as he had to deal with being called by his real name: John.