The problem is that when the subject of troll romance is broached, our sparing human intellects instantly assume the most ingratiating posture of surrender imaginable.
But we will do our best to understand regardless.
Humans have only one form of romance. And though we consider it a complicated subject, spanning a wide range of emotions, social conventions, and implications for reproduction, it is ultimately a superficial slice of what trolls consider the full body of romantic experience. Our concept of romance, in spite of its capacity to fill our art and literature and to rule our individual destinies like little else, is still just that. A single, linear concept. A concept usually denoted by a single symbol.
Troll romance is more complicated than that. Troll romance needs four symbols.