Justin Bieber put a fan's phone down his pants because he's Justin Bieber
During one of Justin Bieber's recent concerts, a fan threw their phone on stage. When Bieber saw, he did what anyone else in his position would do. He put it down his pants.
Look, at this point I have no idea what is going through Bieber's mind since I'm not an uber powerful, 19-year-old superstar. The closest experience I had was in 7th grade when I won the Geography Bee, and I got to put my trophy out on my desk. My ego was out of control that week, and I was just acting like a fool. So, I don't know, I just imagine he's probably going through something similar right now.