A few years ago , I visited my childhood home and heard a surprising sound: the bright and bouncy music of the Puerto Rican rapper Bad Bunny. My parents are white Baby Boomers who speak no Spanish and have never shown a taste for hip-hop, but they’d somehow gotten into Benito Antonio Martínez Ocasio, whose sex-and-rum-drenched lyrics they couldn’t begin to decipher. The vector of transmission appeared to be the streaming service hooked to their smart speakers. When in need of a pick-me-up, Mom