Aunt Helen turned to drugs, alcohol, and promiscuity to deal with problems that haunted her for years. We'll let you figure out how that turned out.

Charlie gets exposed to pretty much all the negative sides of sex. Aunt Helen's molestation in particular leads to a very traumatic situation for Charlie.

Charlie's family doesn't exactly show their love physically, aside from Aunt Helen. When we find out that Aunt Helen molested Charlie, our understanding of his attitude toward physical affection becomes even more complicated.