Belladone literally translates to "belladonna", a highly poisonous plant. It's an intriguing and somewhat dark word to use in a song, especially in a romantic context.
Serge Gainsbourg uses it as a metaphor for a beloved woman who, despite being beautiful, has caused him immense pain and cost him dearly, much like the toxic plant. This unique and evocative comparison makes the word stand out and adds a layer of complex emotion to the lyrics.
Serge Gainsbourg's "Personne" is a fascinating and a bit dramatic exploration of a relationship's end, full of regret and a touch of self-pity, but also some blunt honesty. He starts by admitting, "J'ai peur de ne prendre intérêt à rien du tout / Mais à personne" [I'm afraid of not being interested in anything at all / But in no one], suggesting a deep emotional detachment that extends to everyone, even the person he's singing to. He then directly addresses this "Belle personne" [Beautiful person], acknowledging his love for her and his past mistakes, like when he says, "Non jamais je n'aurais dû porter la main sur / Votre personne" [No, I never should have laid a hand on / Your person].
What's really interesting is how he uses the word "personne" [no one/person] throughout the song. It shifts from meaning "no one" to referring to the actual person he's singing to, and even to himself, as in "De ma personne" [Of my person], meaning his own being. He's clearly struggling with his own identity and actions. He even makes a slightly sarcastic offer: "Croyez-moi je vous ferai passer pour une aimable personne" [Believe me, I'll make you out to be a kind person] if she keeps quiet. The song ends with a wonderfully cynical line, "Jamais je ne me suis aussi bien entendu / Qu'avec personne" [I've never gotten along as well / As with no one], which is a classic Gainsbourg twist – finding peace in solitude, or perhaps just in the absence of conflict.