“Men can’t be trusted,” Dennis’ hawk-eyed mother tells him at dinner. He looks up from his roast. Is she talking about him? “You remind me so much of your father,” she continues. The lines are from “Dennis,” an eighteen-minute short film about an introvert bodybuilder who at thirty-eight years of age—and three hundred pounds of muscle—is still an innocent boy in heart and soul. He lives with his controlling mother in a small town with an unpronounceable name, just outside of Copenhagen. “Dennis” is a Danish film, but despite the country’s humble population of 5.5 million people, the short has surpassed four million views on YouTube. It premiered at Sundance in 2008, and four years later, Mads Matthiesen, the film’s director, returned to the festival with Teddy Bear, a full-length feature about the same character.