The 'JD Vance couch story' might have its origin in his memoir or personal accounts. If he had some formative experiences while sitting on a couch, like having important conversations with family members or coming to certain realizations, that could be the origin. It could also be a story that emerged from his upbringing, perhaps a memory from his childhood home and the couch was a central place for family interactions. But again, without clear details, it's all speculation.