Why does Jared Kushner still call Trump "daddy"? Psychologists explain.

It’s normal to hear a five-year-old child call his father "daddy," but it’s a little more surprising, and even unsettling, coming from the mouth of a 36-year-old businessman. The Twitterverse is mocking Jared Kushner, senior adviser to President Donald Trump, for still using “daddy”. In this Newsweek article, psychologists, including Elliot Jurist of CCNY, explain why some continue to address their parents this way through adulthood.
http://www.newsweek.com/jared-kushner-still-says-daddy-psychologists-explain-why-he-cant-grow-696419