What it says on the tin

obviously it's a control thing, we know he's got some issues with that, but I really do think it'd be more than that.

like, he spends all day in a high stakes environment, where he's in charge of getting staff/patients to listen to him. sometimes it's easy (as easy as it gets in the ed), but sometimes it's a fight down to the very last second. so I could see him wanting to decompress and get away from that, tired of giving orders only to spend the day questioning if they'd been followed, and having to reprimand those who didn't comply.

18+ mdni ugh yes :(( frank’s holding onto you by your waist while you press sweet little sloppy kisses to his temple and cheek… both of you are pretty out of it but robby is so not used to that from frank and def doesn’t clock it. he’ll scoff and condescend “Easy, tiger, nobody’s gonna take her from you.” before heading to the bathroom to get some washclothes

jack catches the way frank’s brows knit and a little concerned hum leaves his throat as he noses into your clavicle… “Hey, hon, you okay?”

but robby’s back before frank can even try to answer. he tosses frank a washcloth and says bluntly “Clean up, I’ll handle her—“

“Mike,” Jack mutters. He takes the other washcloth from Robby. “You clean him up.”

Jack has fisted Robby many a time, knows how to ease in with a folded hand- fingers overlapped to create a gradual spear, thumb tucked under, nice and slim for the initial penetration before he can curl his hand into a fist inside Robby. Rolling and rubbing his knuckles along Robby's walls, almost digging them into his prostate all to draw out these keening whines from Robby's throat.

Then it starts not being enough of a stretch for Robby, the aching burn isn't hot enough, his thighs don't tremble like they used to. He's reluctant to say anything because he feels so greedy and embarrassed that Jack's speared hand isn't enough... but he fucking needs it. Needs to feel that 'too much too much too- fuck yes finally' feeling of something massive stretching his rim and sinking into his body. Eventually Robby plucks up the courage to ask Jack to skip the neatly folded position and start with his fist balled.

"You think you can take it closed? Yeah? Fuck, my fist is so God damn big next to your hole. Want it, baby? Gotta keep telling me otherwise I'll stop- need to hear that you want it."

And Robby is whining and gasping out an endless stream of "Yes. Yes, yes, yes, yes-" as Jack angles his fist just right and pushes in, stretching Robby's lax hole even further. He can't keep his back from bowing, instinctively trying to get away from the harsh burn but he never stops his litany of "yes, yes, yes-" even as his hole barely stretch around the widest point of Jack's fist. Robby only goes quiet -well, not quiet, but he stops forming real words- when he's swallowed Jacks hand up to his wrist.