A = Aftercare (what they’re like after sex)
Jacaerys adores you, his heart would probably break if it had to hold all the love he carried for you at once.
So of course he would take care of you after sex. Soft kisses trailing down your entire body, and personally seeing to it that you get a contraceptive tea to drink if you two aren't married at the time.
B = Body part (their favorite body part of theirs and also their partner’s)
Jacerys loves his mouth, able to give you so much pleasure without lifting a finger. It's one of the main things that connects him to his targaryen heritage—make no mistake, that man is talking you through it in valyrian.
And if you don't understand what's he's saying, he might teach you later.
He likes your eyes, he makes a habit of staring into them whenever you look at him. When he sees the love you have for him, it's just so validating.
He could watch them roll into the back of your head while he makes love to you all fucking day.
C = Cum (anything to do with cum, basically)
It depends on if you're married or not. If you two are only betrothed? He will only cum on your stomach, maybe in your mouth if you offer to give him head but he would never beg.
He doesn't like cumming on your chest, thinks it's kinda messy and my boy is a bit of a classist.
He won't cum inside you, and he might actually get offended if you even suggest it...he's rather insecure about being a bastard. So he wouldn't risk doing that to a hypothetical child.
But if you're married? Oh forget it—every single time you're getting his cum inside you, without fail. He can't help it—he held back enough when you were betrothed. He has the blood of dragons inside him, he wants to claim his lover in the most primal way possible.
It doesn't matter if you're a man or woman, creampied.
If you two aren't ready for kids—he'll provide you with the best contraceptives possible. He is the prince of dragonstone afterall. It'll probably taste bitter, but atleast you know he cares for you.
D = Dirty secret (pretty self explanatory, a dirty secret of theirs)
Really wants to take control in the bedroom, and be a bit rough and manhandle you. He won't ever suggest it though...terrified of not being your perfect prince.
E = Experience (how experienced are they? do they know what they’re doing?)
No experience besides you, I think this is pretty much canon actually. Considering the era you would both be pretty ignorant about sex, but realistically would end up experimenting before marriage because of hormones.
He gets better the longer you're together, he's a quick learner. And a devoted lover.
F = Favorite position (this goes without saying)
Any position he can see your face, so more times than not you're riding the dragon or laying on your back. He's willing to experiment if you want to try something out though.
G = Goofy (are they more serious in the moment? are they humorous? etc.)
He might actually smite you if you try to make fun of him during the act. This level of vulnerability between the two of you is something he doesn't take lightly so he needs to know you care too.
But a smile or joke when something silly happens is okay.
H = Hair (how well groomed are they? does the carpet match the drapes? etc.)
Very well groomed, he has access to the best products anyway. Also wants to look his best for you, so he would take extra good care of his skin.
He does have a small patch of white hair near his pubes though.
He wouldn't care how your body looked undressed unless you were dirty or something.
I = Intimacy (how are they during the moment? the romantic aspect)
Every other word is praise or adoration. Its almost sacrilegious how he worships your body like you're the eighth God of Westeros.
There will be no doubt in your mind that he loves you, in and outside the bedroom.
J = Jack off (masturbation headcanon)
If he doesn't have access to you? Often, without shame.
But if you're near—he doesn't see the point.
K = Kink (one or more of their kinks)
Praise Kink, Breeding Kink, Submission Kink (Both ways), Voice Kink.
L = Location (favorite places to do the do)
In your bedchambers, or his study. It just needs to be private, he's a private person.
M = Motivation (what turns them on, gets them going)
Seeing you nude, or when you let him be there for you. He craves validation and being able to protect his loved ones himself—call him your betrothed publicly? And he's adjusting his breeches with quickness.
N = No (something they wouldn’t do, turn offs)
Letting you call him out of his name, especially calling him a bastard. Instantly soft and he's not speaking to you for a few days.
Also he would never ever hit you, or be overly cruel.
Some slight class based degrading is fine...but actual bigotry or offensive remarks? Quickest way to make him rethink his entire life.
Also would never bring another person into your bed, would rather die. Infidelity isn't even a word in his vocabulary.
O = Oral (preference in giving or receiving, skill, etc.)
Prefers giving, because learning to please you makes him feel better about himself.
At first he was always too eager and sloppy, drooling all over you and your juices would shamelessly drip down your thighs, but his pretty face and tongue skills would quickly end up making up for it.
P = Pace (are they fast and rough? slow and sensual? etc.)
Depends on the day. If he's in a vulnerable mood, he wants to make slow love to you, and preferably hold your face in his hands.
But if he's feeling jealous—or maybe frustrated over another aspect of his life? Then you're getting pounded through the bed.
Q = Quickie (their opinions on quickies, how often, etc.)
Wouldn't see the point in it, he would rather take his time and appreciate you fully.
R = Risk (are they game to experiment? do they take risks? etc.)
Yes, but you would have to ask first. He craves you carnally, but even years into a relationship he would be afraid of breaking any percieved boundaries.
S = Stamina (how many rounds can they go for? how long do they last?)
He's heir to the iron throne, raised to lead Westeros both politically and through the military. And he's also a dragonrider, with thighs of steel.
He can go as long as you want him too, past the point of trembling thighs or weak knees.
But he prefers either one really long session or two medium length ones.
T = Toys (do they own toys? do they use them? on a partner or themselves?)
Contrary to popular belief, people in the middle ages actually did have sex toys invented already. But I doubt Jace would have one.
U = Unfair (how much they like to tease)
A lot actually, it gets him going. And it's the easiest way to get praise from you without having to do the begging himself.
He would edge you for a long time, him pouting more than you while he shamelessly just asked for you to need him.
V = Volume (how loud they are, what sounds they make, etc.)
Whimpers and soft groans, I don't make the rules. And definitely slips into valyrian when close. Tries to keep it down for dignity but that never lasts long.
W = Wild card (a random headcanon for the character)
Okay so you know how premature targaryen babies come out sort of dragon like?
I imagine most targaryens develop dragon like traits when they find a significant other—or mate in simpler terms.
Jacaerys is better than most of his family, but even he's susceptible to competiting for your attention, stimulating you by rubbing your back to nudging you to gain your attention, and trying to making you two smell similarly (All I'm saying is look up Komodo Dragon's).
X = X-ray (let’s see what’s going on under those clothes)
Jacerys is packing six and a half inches, and it's slightly curved. Enough to fill you up but not enough to hurt or tear anything, perfect length actually.
It flushes a soft pink when he's excited, and leaks thick pre-cum. His cum is even thicker. And yes he has freckles down there too.
Y = Yearning (how high is their sex drive?)
King of yearning, could fill entire letters with his love for you. He's always willing to make love to you, but rarely suggests it first unless he's provoked.
Z = Zzz (how quickly they fall asleep afterwards)
Not an easy sleeper actually, he has to actively plan to fall asleep each night.
So picture him lulling you to sleep while you both cuddle afterwards. Limbs tangled and hearts pounding in your chest, while he watches your chest rise and fall.
That's it for today, hope you enjoy the headcanon list. I prefer comments over likes, so lmk what you think!!