In an Inside Out 2 fanfiction, we could see what happens if the memories start to blend in a new way. Maybe some happy memories start to have a tinge of sadness or vice versa. This could create chaos in Riley's mind, and the emotions would have to work together to sort it out. For instance, Joy and Sadness might need to collaborate more closely than ever to understand how to deal with these new types of memories.
Well, without more context, Ralph could be anyone. He might be the author's alter ego, or perhaps a fictional character from a particular genre like a children's storyteller or an old man sharing his life experiences in a fictional town. In any case, we need more details to really know who Ralph is.
One way is to use analogies. Riley could learn about sex in the way she learns about how a flower needs pollination. It's a natural process. So, in the story, we can compare human sexual development to natural processes in nature. This makes it more palatable for a family - friendly read while still getting across the basic idea of learning about sex in a general sense.
Big Brother could be an individual who has been observing and gathering information secretly for a long time. He might be an insider in a particular system, like an employee who has access to confidential information.