It's wrong to go to brothels if you're underage.
David is walking home from school with one of his friends.
David wants to do something fun and exciting.
David and his friend walk across a train bridge to cross over a creek instead of sticking to their usual route home.
David and his friend sneak in to an adult only club through an open door they notice in a nearby alley.
David's friend is a little scared by how high the bridge feels, but after crossing it he feels exhilarated.
David's friend sees several naked women under bright, flashing lights and is scarred by the experience.