Connections (слэш)

""Junctura cognoscitiva”, to give the condition its Latin, medical title. Although rare, affecting around 1 in every 650,000 of the British population, the condition was very widely known and recognised, mostly because of the romantic implications. Much had been made of the connections between soulmates in poetry, music and literature over the centuries, and it was heavily featured in many a tawdry romance novel."
Sherlock didn't believe in soulmates. Until his made it impossible not to believe.