He's never been able to decide if Kon does it on purpose, or by habit. It doesn't bother him. Mostly.

Jason moves his limp cock out of the way before spreading his lips wide with two fingers. His hole flutters, and off-white come drips down his perineum. "Whoops," he deadpans. "Looks like I've been naughty, Daddy." Bruce hums. He rolls back his sleeves before stepping forward. "Who did this to you, baby?" Jason's grin is positively feral when he answers: "Dick."