Yessss, because Damian is too deicated to being Robin sometimes to properly care for himself, and one day when it's so backed up and Dick finally brings Damian into his bathroom to clean it for him.
Damian is sitting there, arms crossed, in front of the bathroom mirror in Dick's spare apartment in Bludhaven, head tilted to the side- scowling.
Dick is going in with a cleaner, gently scolding Damian about taking care of himself, not even realizing how hyporicital it is with all his laundry, take out bags, and sick full of dishes with the trash needing to be taken out, the toothpaste specked mirror that hasn't been given a wipe down in months. He's so busy, ok, he just hasn't gotten around to it.
Damian, getting that feeling we all get when you stick a q-tip in your ear and wriggle it around. It's so fucking good. Like a dog getting that perfect spot scratched and their leg going. Damian is a little too blissed out when he starts to get a boner.
Dick, who sees it midst cleaning, who can't help but position himself in a way where he's rubbing up against it with his bare legs, feeling Damian's cock through his boxers as he gets more and more turned on.
Damian realizes this, letting himself move his hips a little bit, enjoying the friction as much as the cleaning, until he's nearly full on humping Dick's leg.
Dick's saying things like, "Yeah, I know it feels good. Like a head scratcher, amiright?" as if Damian's not a huffy little whimpering mess under him. As if there's nothing going on but him being a good older brother, helping out his younger sibling and teaching them proper care.
They both come out cleaner and dirtier by the time Damian's ears are cleaned.