The meaning behind "TK421" is open to interpretation, with potential references to Star Wars, Boogie Nights, and a phallic monocular. The song appears to be a celebration of sexuality and a call to break societal constraints to embrace freedom and creativity.

NPR's Scott Simon talks with Lenny Kravitz. The musician and style maven is out with a new album, "Blue Electric Light."

1991: Lenny Kravitz and Lisa Bonet separate Most notably, he dedicated the hit song "It Ain't Over 'til It's Over" to the actress. "I still love her very much," he told The New York Times in 1993.