Welcome to the Second Thought newsletter, my weekly tour of what’s going on in the zeitgeist: This week in pop culture, like most weeks, began with a meltdown over Sydney Sweeney. This time, it was about her character on the show Euphoria, the HBO series that mirrors Sweeney in at least two ways: First, people never fail to get riled up over what it shows, and says, or what they think it might be saying—and second, they simply cannot look away.O…