Commas cleave sentences with contingency. Whenever you use a comma, something could have been done differently (but not necessarily better). Try rewriting a paragraph to remove every comma, dash, and parenthesis.
"Something out of childhood whistles through this space, a sense of games and half-made selves, but it’s not that you’re pretending to be someone else. You’re pretending to be exactly who you are. That’s the curious thing."