Could it be Apodyopis or Gymnophoria for that AU in wich Donna is a doctor and John is clumsy?
Gymnophoria - The sensation that someone is mentally undressing you
"Hi there, Doctor," John greets breezily.
"Hello, John," the Doctor greets as she draws the curtain behind her. John is fiddling with the ties of his hospital gown. "It’s a bit early to be in for even you, isn’t it?"
"Yeah, breaking my own record," John laughs nervously. His fingers continue to fiddle with the white string under his neck. Somehow he takes the bow it took him ten minutes to do and undoes it in two seconds.
"Oh!—here," the Doctor jumps up to tie the gown again. Her clipboard tumbles to the ground but apparently the top bow of John’s robe is much more important to her.
"That’s ok—cold!" John yelps as the Doctor’s icy fingers brush the top of his spine. She mutters an apology and begins tying the bow slowly enough for John to remember he’s rather under dressed. The Doctor’s movements slow considerably and he blushes up his neck.
The Doctor does remain silent, much more occupied with looking down John’s wiry back. There are plenty of scratches and scars all along it; a map to his clumsy life story. He’s more muscled than she expected for his two bit frame, seeing his muscles contract around his flanks as he breathes…
John grows more flustered by the second, worrying about a thousand things at once. What’s got the Doctor so transfixed? Is she looking at how skinny he is?—the bumps of his spine? Is she looking at his underwear (with the Flash lightning bolt across the arse)?! The hairs on the back of his neck are standing up. He glances to the metal cabinet, where he can make out the reflection of the Doctor checking him out intently. John shivers; he’s never been “checked out” before, let alone by a woman as…Doctor-y as…the Doctor…
"Sorry," the Doctor mutters hurriedly as she steps away from John. She spares a flustered hand to rake through her hair, scolding herself for literally drooling over a patient. "So, um, what brings you in this morning?"
Apodyopis - The act of mentally undressing someone
The Doctor listens intently as John recounts the story of how he took a tumble off the kitchen counter while trying to retrieve a cup. It’s just like last week, when he rolled all the way down Mister Alworthy’s hill to catch a goose waddling into his garden. John means well, but has the coordination of perhaps a two-left-footed-snake-in-galoshes.
"So, of course, bump my head right on the counter corner," John laughs as if the incident couldn’t have rendered him dead with different luck.
"You should be more careful, John," the Doctor notes lightly, still listening but far from focusing on his words. Her chin rests in her sly fingers, tapping slightly against her cheek. Her eyes remain on his oddly muscly back. Shadows dance along his flanks, traveling down to the dimples over his adorable backside. That is one cute bum; the Doctor bites her lip.
"Doctor?" John turns and calls out to her. Her eyes are transfixed blankly, without any real desire to focus. Under the lighting of the room he can see that a pale flush is creeping up her neck. It looks like there’s something on the tip of her (delicious, totally cute) tongue. "Is everything all right?"
"Hm?" she startles a little in her seat. She blinks, realizing she has spent the last ten minutes shamelessly licking John head to toe with her mind. She’s always had a bit of a thing for him, of course, but there are so many rules against she shouldn’t even be considering it. That being said, she has considered - and dreampt of - enough to have crossed that line long ago.
"You look kinda…spaced out," John blinks but still smiles disarmingly. The Doctor remains flustered and he feels heat creep up the back of his neck, "earth to Spacegirl."
"Sorry John, I guess I’m a little," the Doctor licks her lips, now wondering what his chest is like under that cotton gown, "distracted."
"That’s all right," John shrugs, just short of twisting self-consciously. He clenches and unclenches his fists anxiously by his sides. "Should I…I can come back another time."
"No, no, don’t be…it’s fine," the Doctor shakes her head a bit and stands. John lies himself down and she leans over with her stethoscope. Her hair, loose and flowing freely, pools on his chest like liquid fire. She clears her throat nervously, "sorry."
"S’okay," John murmurs quietly, quite frazzled by the mounting tension in the room.
The Doctor keeps herself quiet now, trying to focus on her work. Instead, she focuses on the sound of John’s rapid heartbeat (his pulse is always fine when it’s checked, then when she listens to his heart it’s hurried). She focuses on the feel of his chest under her fingers, and how her own heart feels like it’s traveling up into her throat. Her palms suddenly become clammy and she withdraws.
"Doctor, are you okay?" John asks with an innocent blink at how her cheeks turn steadily pinker.
"Um, yeah," the Doctor stutters to talk past her blushing. She struggles to keep her mind steady and leans up again. Her fingers flail for the stethoscope as images of a very naked John Smith continue to fill her mind. "I’ll, um, I mean you nud—NEED!!…um, you need…muscle relaxant."