Andy Cohen loves the big hair and flashy fashions of Bravo’s “Real Housewives.” “That’s part of the fun,” he told us. “It’s fun when everybody screws up. It’s fun when I wear something stupid.” Cohen got to play up his inner “Andy Wintour” to curate a sale for Gilt Man, which started Wednesday. He launched the collection, along with the paperback release of his book “Most Talkative,” on Tuesday at a dinner with Kelly Ripa, Gayle King, Sean Avery, Sandy Gallin and Bryan Lord at Maysville in the Flatiron District.