The fact is that according to the plot of the movie, one morning, the character played by Radcliffe, Ig Parrish, wakes up and discovers that he has horns. These horns give Parrish the ability to read people's thoughts. In an interview with British TV Daniel said he would like to have such an ability, and try it on Justin Bieber. "You hear so much stuff about him that you are just like, "I want to really know, I want to get to the bottom of this!" And with horns, I would be able to."
By the way, western journalists found out that Radcliffe's colleague, Erin Darke loved the horns of her partner. "She loves them. How could you not?" asked ex-Potter. "They're glorious and I hope very attractive," added the actor.