In 1969, Gainsbourg and Birkin released the duet "[[Je t'aime... moi non plus]]" ("I love you ... me neither"). Gainsbourg had originally written the song for [[Brigitte Bardot]] and Birkin said it was "jealousy" that drove her to sing the song.<ref name=":1" /> Shortly after making the recording, Birkin and Gainsbourg went for dinner at the Hotel des Beaux Arts in Paris and without saying anything, Gainsbourg put a copy of the discsong on the record player. Birkin recalled that all of a sudden, all the couples around them stopped talking with their knives and forks frozen in mid-air. Gainsbourg said, "I think we've got a hit record".<ref>{{cite web|url=https://www.thetimes.com/uk/obituaries/article/jane-birkin-actress-and-singer-dies-aged-76-snwhcm3ql | website=The Times | title= The Times Register: obituary Jane Birkin, English-born singer and actress |date=17 July 2023 |access-date= 28 October 2024 }}</ref> The song caused a scandal for its sexual explicitness and was banned by radio stations in Italy,<ref name=italy>{{cite book|last1=Cheles|first1=Luciano|last2=Sponza|first2=Lucio|title=The art of persuasion: political communication in Italy from 1945 to the 1990s|url=https://books.google.com/books?id=Vy1NMicVUEEC&pg=PA331|year=2001|publisher=Manchester University Press|isbn=0-7190-4170-8|page=331}}</ref> Spain and the United Kingdom.<ref name=omm>{{cite news|url=http://observer.guardian.co.uk/omm/the10/story/0,,1487369,00.html|title=The 10 most x-rated records|last=Spencer|first=Neil|date=22 May 2005|work=Observer Music Monthly|publisher=Guardian Newspapers|access-date=3 August 2010|location=London}}</ref> In Italy, the head of their record label was jailed for offending public morality.<ref>{{cite web|url=https://www.thetimes.com/uk/obituaries/article/jane-birkin-actress-and-singer-dies-aged-76-snwhcm3ql | website=The Times | title= The Times Register: obituary Jane Birkin, English-born singer and actress |date=17 July 2023 |access-date= 28 October 2024 }}</ref>
{{quote box|width=22%|align=left|bgcolor=cornsilk|style=font-size:100%|quote=[It is] very flattering to have the most beautiful songs, probably, in the French language written for [you]. [But] how much talent did I really have? Perhaps not that much.|source=— Birkin reflecting on her working relationship with Gainsbourg, 2013<ref name=owen />}}