The entire climax in #4, which defiantly states that "dark, edgy" stories are ultimately childish, and that "only a bitter little adolescent boy could confuse realism with pessimism", and that there's nothing wrong with a happy ending. Ultimately, Flex doesn't care what he signifies.
Flex: I'm a superhero. Being clever's a fine thing, but sometimes a boy just needs to get out of the house and meet some girls. Gamble a stamp. I can show you how to be a real man.