In the pantheon of queer models of femininity, Barbra Streisand looms large — just below the holy trinity of Judy and Liza and Liz, perhaps. For many gay men of a certain age, La Barbra is something akin to a goddess. I’ve never understood the appeal, myself; but with the 3-DVD set Barbra Streisand: The Concerts sitting on my desk and awaiting review, it’s high time I figure it out. Because let’s face it — we are all products of gay culture now. If that sounds like paranoid heterosep