"In retrospect, it's funny." Much has changed for Johnny Rzeznik and Robby Takac during their nearly 40 years together as Goo Goo Dolls. But one thing hasn’t. “John and I will actually slap each other and punch each other and get the aggression out,” Takac tells Billboard via Zoom from the Chicago stop of the Goos’ Summer Anthem Tour, named for the new EP the duo is releasing on Friday (Aug. 22). When’s the last time that happened? “Oh…about a year and a half ago,” Takac says with a laugh. “In retrospect, it’s