The song was written in 1967 when the Sexual Revolution in France was at its height: women wore mini-skirts and trousers and the Neuwirth Law was adopted, authorizing contraception.

[3][4] However Vartan, whom Fabien Lecœuvre [fr] notes had matured into a provocative young woman with a sensual voice[5] in the two years she had been married to Johnny Hallyday, had not become a "frenzied feminist".

[4] According to Jérôme Pintoux (in his book Camion blanc: Les chanteurs français des années 60), the verses of the song "celebrate androgyny, but without ambiguity", while the chorus "sings femininity".

A woman riding a motorcycle overtook the taxi and the driver exclaimed, "Les filles aujourd'hui sont commes des garçons!"

When he arrived home, he phoned Eddie Vartan, Sylvie's older brother and producer, and told him about the idea for a new song (at that time he had only the title).