How did John and Lorraine become friends?

John and Lorraine first met on the bus on the way to
school.  He sat down next to her which made her at first feel uncomfortable.  He almost
immediately began laughing, so she thought he was making fun of her.  His laughter was
contagious because she started laughing too and the two of them laughed together
uncontrollably.  Though they are very different, John and Lorraine are able to remain
good friends because they can keep each other laughing and can feel comfortable being
silly around each other.  This laughter is a nice antidote to cure the pain they
respectively feel from their dysfunctional families.