Explain the relevance of the title in relation to Charlie’s character. What is a “wallflower”? And what does Charlie gain by being one?

Abuse, both sexual and physical, plays a large role throughout the novel. How does the abuse that Charlie experiences and witnesses directly influence his character? And how does secrecy play a role in these abuses?

In Chapter 39, Charlie mentions feeling nostalgic for “bad things”(139). How does he define nostalgia? And how does this relate to his aunt Helen?