"I grew up sort of an awkward, chubby kid and I got made fun of a lot," the 38-year-old actor and playwright tells Shadow and Act. of taking off his shirt, which was the talk of Twitter. "It just sort of stays with you, even now at this age, as a very, very grown a** man, I'm still scared of it." He added: "I do not like taking my shirt off ever in public, so, this episode, I'm facing one of my 5 biggest fears. It was pretty nerve-wracking, honestly." ALSO: Is Chidi's storyline implausible?