Over 30 years into her career, Madonna is still acting like a virgin. “I’ve never performed in Brooklyn before,” she coyly told a sold-out crowd at the Barclays Center in Prospect Heights Saturday night. The Rebel Heart Tour, which kicked off in Montreal two weeks ago and landed in the borough for one night after two performances across the river at Madison Square Garden, is the singer’s 10th stage show. While she’s finally warmed up to her ’80s hits after years of ignoring all but a handful, she still insists on challenging her fans, who, I suppose I shouldn’t have been surprised to see, are still dressing up like her. Only now it’s the men. Here are 10 other things I learned at the show.