Moving through the lobby of a posh Santa Monica hotel one May afternoon, Jerrod Carmichael is not so much walking as strutting. Tall and slender, he’s wearing a black cashmere sweater, matching pants, loafers, an Afro pick, and an outsize smile. And then there’s the brooch: Stunning gold. Cursive font. The letter R. “I love it so much,” Carmichael says, gazing down to admire the pin. It was a gift from a friend a few weeks ago, for Carmichael’s 35th birthday. Ever since, he’s been “building outfits around it.