Does Beyoncé Really Need Sasha Fierce?

"It's hard to imagine Beyoncé scratching an itch without undergoing a little media training first," writes Slate's Jonah Weiner » 11/25/08 5:20pm 11/25/08 5:20pm. "In the nothing-is-private era of TMZ, she still believes there's such a thing as TMI." But when B wants to be more outspoken, flamboyant and unleashed, she blames that behavior on her alter ego, …