Finally, an age-old mystery has been answered: How did Park and Recreation’s Dr. Saperstein (Henry Winkler) maintain such magnanimity toward his two brat spawns, Jean-Ralphio (Ben Schwartz) and Mona-Lisa (Jenny Slate)? Decades-brewing guilt over a big, fat secret, perhaps? Like, say, his child’s true parentage? Yep, Ben Schwartz confirmed it: The Fonz is not Jean-Ralphio’s biological father. As much of the internet has speculated, that, um, honor belongs to Stranger Things’ Steve Harrington. This ain’t a surprise: Beyond the singular hair volume and eyebrow arch, there’s the Indiana birthright and, yeah, Steve may have managed to restrain his ’80s-boyfriend jerk impulses for a while, but that doesn’t mean they weren’t there, lurking in his DNA, waiting to breed. So, good news! “I’m assuming there’s a 100% chance of me being on Stranger Things seasons two through 100,” Schwartz says. Because passing resemblances don’t lie.