From wikipedia
“Brian Wilson cited the song as his attempt to capture the essence of his all-time favorite record, “Be My Baby” by the Ronettes. Wilson estimates he has listened to the song “more than 1,000 times.”
It didn’t capture the essence of ‘Be My Baby.’ If anything it captured Jody Reynolds’s ‘Endless Sleep.’
https://www.youtube.com/watch?v=aORD1aRz_qI