Most people wouldn't be able to hear the minute swish or near-silent landing as Superman alighted on the rooftop. Robin isn't most people. He doesn't turn around, just keeps looking at the Daily Planet's globe as he perches on the railing on the roof of the third tallest building in Metropolis. (This meeting is too important to be interrupted by Luthor's security, as much fun as pushing the man's buttons is.)
"You wanted to talk with me." Superman sounds wary, which means he likely has some idea about why Robin contacted him.
"It's lonely." He says, instead of answering properly. "When you don't have a proper home and you know nobody wants you."
He turns around and pulls his mask off so they are eye to eye. "I can't even imagine how much it would hurt to also have been rejected by your hero."
Superman takes a step back and looks about to fly away so Robin rushes out his next words. "I'm not saying you need to be his parent, Kal."
That earns him a sardonic look. "Batman seems to think I should."
Robin shrugs. "Bats is on edge. The situation is hitting him a little close to home." Supes looks a confused so he taps Baby Bat out in Morse code on the railing and watches the realization dawn. "But what Kon needs isn't necessarily a father. Or not for you to be his father anyway." He shrugs, knowing that it makes his cape ripple in a pretty cool way. Hey, it's the small things in life. "I can't speak for him, but he would be happy to just have you as family. Or even just as a part-time mentor."
Superman opens his mouth but Robin isn't done. "Look, I get it. You didn't plan for this, you had absolutely nothing to do with it, for all intents and purposes you were treated as a lab rat, what with the stealing of genetic material and all, and I don't expect you to just…be okay with it. But he's here and he needs help. And none of it was his fault."
He gives Clark his most serious look, the one he uses to convince Damian to not try and kill Tim and gave the juvenile judge who had eventually awarded Bruce custody. "Bats and Canary are doing their best, but they aren't Kryptonian. None of us are. There are some things we just can't help him with."
"Family isn't about genetics." Clark says tightly and Robin scoffs.
"Of all people, you and I know that. But that doesn't mean that you have to deliberately exclude someone because of genetics." He pulls his grapple from his belt and readies it. "Also, I'd hope my siblings don't figure out exactly what is going on. Kids being neglected and abandoned is something of a sore point with us." He puts his mask back on. "We've all been there. And I can't imagine your parents would be all that happy either."
And he takes off, hoping that Clark will at least think about what he'd said. Bruce had tried and failed, hopefully this will have more of an effect. (He honestly would prefer to not have to send Tim to talk with Ma and Pa Kent. Pushing Clark into anything won't help and anyway, he isn't that cruel.)