Oh, they were supposed to be two intersecting parallel lines, but they still met, got to know each other, and agreed, and she even had his child. What do you think? Is it more painful to be always parallel but not intersecting? Or is accidental intersection more painful? Parallel lines that never intersect are often used as a metaphor for sad lovers. In fact, this is not the case. The saddest love affair in time should be two lines that should not intersect but still intersect - two straight lines that cannot be bent and sadly go their separate ways after a brief intersection. And what about parallel lines? To hold hands forever and never separate, to go on together, is the happiest love, isn't it?