By Bonnie Stiernberg The first things you’ll notice if you pick up a copy of Heterosexuality, the eighth album by Shamir Bailey — who performs as the mononymous Shamir — are the horns and the hooves. He sports them and sits defiantly on its cover, dressed as a Baphomet, the mythical goat-like creature meant to symbolize “the equilibrium of opposites”: human and animal, man and woman, good and evil. It’s a fitting image, of course. Since he first burst onto the scene with his acclaimed 2015 debut Ratchet, Bailey has refused to be confined by outdated black-and-white thinking. He came out as non…