It's been forty years since Max Weinberg was enlisted by Bruce Springsteen to drum in the legendary E Street Band.

But if you ask the drummer, nothing has changed. And that includes one of Springsteen's most iconic physical features. "You know, you took the words right out of my mouth. The music is timeless and so is the butt."

And Weinberg admits he has been looking at that view in concert for decades, further joking about The Boss' derriere.

"His entire back [is my view]; his back, his waist, his butt," he told NPR's Wait Wait... Don't Tell Me! in an interview posted Dec. 6. "And I'll tell you, regarding that view, some of you may remember the Born in the U.S.A. album. So when we were making that record, there were, in the studio we were in in New York City, there were these prototype record covers lined up on the wall.

"And most of them featured Bruce's face. There were a couple of cars with some people in them. And there was this one shot of what became the album cover," he continued. "And I voted for that one because that was the view I always saw. I didn't recognize him from the front. I've never seen him from the front. I've only seen from the back."

Despite the years spent performing together, as it turns out, Springsteen can still keep Weinberg guessing and it usually happens in front of a live crowd.

"You know, if you've ever seen our concert, you'd know that we have a performance review every night. It's true. Because we'll go out and we'll play for three or four hours, and usually that's about 30 songs. On any given night, 15 of those songs are what we call audibles," he explained. "You literally don't know what he's going to decide to play. And if you're lucky, he'll tell you. But that doesn't happen every night either. He'll give you a little hint in a guitar chord he may be playing.

"Absolutely. Panic when Bruce Springsteen goes, in his patented voice, one, two, three," he further shared. "Well, and he gets to four and you don't know what song he's going to play. And if you know most of our songs, it sort of like goes one, two, ba-ba-da-ba - a little drumbeat that fills...That's me. And I'm at three and I don't know what four is."