Pomus and Shuman wrote in the offices of the Brill Building, where many pop hits of the '50s and '60 originated. The biggest consumers of pop music at the time were teenagers, and this song was clearly targeted to them.
"It was an assignment," Pomus told Bruce Pollock
in 1974. We wrote the other side of that record too and I always liked it better. It was a song called 'I've Cried Before.' We had a song that we'd already written called 'Teenager In Love,' and Dion liked the lyric to it and wanted us to change the melody. So we just changed the melody."