Especially because, as LadBible point out, paintings are often of dead wizards, and although Voldemort isn't present in human form in the fourth movie, he definitely isn't dead either.

When writing for a beauty site, you come across plenty of insane transformations — but none so crazy as this Lord Voldemort body art by Jody Steel! Using skin-friendly paint pens, Steel ...

Floating candles in the waiting room, moving portraits in the hallway, Voldemort treating patients in the dental chair. A trip to the orthodontist this Halloween felt more like a day at Hogwarts.