|See also:||kink, idfic, BDSM, daddykink|
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Domestic Discipline (sometimes DD for short) is a label (or depending on the perspective a warning if it is a squick) in fanfic to indicate that a relationship between the characters involves physical punishment or discipline between them (commonly spankings, but also other measures, and it can also include non-physical punishments).
The label is commonly used if it is a consensual relationship, not as much if it is for example a slavefic that features punishments by the owner/master, and the perspective of domestic discipline fic is that the punishment is beneficial, and often, though not always, ultimately desired by the one punished, for example to correct and modify behavior "for their own good". Stories in which pain and punishment is used consensually to relieve guilt are usually not labelled as domestic discipline, because the element of behavior modification is absent. It is also less used if one character is de-aged or a child to begin with and it is a parental relationship or a relationship with a teacher, though some fans do count kidfics with spankings under the DD label. If that perspective of the punishment as beneficial is absent authors usually don't pick the DD label, but one like "contains abuse" or with children "child abuse".
While many discipline stories do feature sexual BDSM relationships, domestic discipline fic (e.g. a subgroup of gen mentor fic) usually isn't sexual. However some gen archives such as the Sentinel archive Cascade Library, have policies that exclude domestic discipline fic. Some gen readers also don't see gen DD fic as truly gen because the id button it pushes for many readers is sexual and works as porn, even if it may not be a sexual situation for the characters. Gen domestic discipline shares that quality with several other power kinks.
Spanking of an adult woman by an adult male, usually a husband or fiance, was completely accepted in mainstream society until relatively recently. Spanking scenes in Hollywood films were commonplace.  One example of spanking in Trek writing: ""When is her birthday?" Kirk muttered. I think the traditional spanking might be in order." Spock raised an eyebrow. "Fascinating custom, Captain. Do you really want to inaugurate it among the command crew of the Enterprise?" Kirk shot him a look of mischief, with just a touch of speculation on whether the Vulcan implied that someone might try to inaugurate it on the Captain of the Enterprise." 
CriticismOccasionally the genre faces the criticism that labelling stories thus is a euphemism for what amounts to spousal or child abuse in reality, in particular if the relationship in the story in question is not highly formalized with prior negotiation and explicit consent to the punishments. The Divine Adoratrice said:
"[...] I have serious problems with the notion that if you love someone enough, you're entitled to cold-bloodedly hit them. Yeah, there are a lot of couples where one person says, "It's for your own good, and you're making me do this," and the other says, "I shouldn't have provoked you." However, in my experience, these relationships inevitably end up in one of four places: a therapist's office, a shelter for battering victims, a hospital or a morgue. I don't think any of these is a romantic setting. [...]"Other fans object to DD because they see it as infantilization and also as overlapping with their incest squicks:
"[...]My difficulty is that apparently I have a very active and far-reaching sense of the incest taboo. Domestic discipline situations strike that primal "Ewwww!" in me because one of the lovers is acting in a parentified way toward the other. [...]
Here, finally, is why I react so violently against domestic discipline. The blurring of the role of parent and lover in thesestories crosses a powerful, primitive, non-negotiable line in me. It's why my response to domestic discipline stories feels more like a moral stand than a personal preference. Even though the characters are both adults and are not related by blood, having them take on roles that are so reminiscent of parent and child within the confines of a sexual relationship tramples all over some very important boundaries I have, in a way that feels fundamentally wrong.
A Professionals fan writes of the overlap with BDSM fiction:
- "Another ugh for me is discipline stones, I have read BDSM stories, and while I feel an uneasiness, yet if it's well done (consensual and erotic) it is OK ... but there's something about discipline stories that sets me on edge. I've tried to analyse why I can read BDSM - I think it's because there's no sex in pure discipline stories, whereas the consensual sex in BDSM at least affords pleasure to both parties. Often in discipline stories there is a definite need by one character, at least for this to happen. But even if it could be called consensual, yet it's just spanking or beating and I can't see any pleasure in it; if there's going to be pain, there should be pleasure to balance it for me. Even if the character 'needs' it, it is still done as punishment and seems to me more perverted than BDSM. Of course it is also to do with my liking my favourite characters to be in control and not in a position I personally would find totally humiliating. In discipline the doer seems to decide when the 'victim' has had enough, whereas in BDSM the sub actually has control through the agreed rules and safeword. Eroticism helps me read BDSM but there's nothing erotic about punishment." 
Examples of Domestic Discipline Fanworks
- The Real World by Saraid is a responsefic. The author notes: "Jim takes his role as Blessed Protector too far and loses everything. A response to the plethora of despicable domestic abuse stories out there masquerading under the too-cute synonym of so-called 'domestic discipline.'" 
- "The Maze", a Kraith installment by Joan Winston (Metamorphosis #2, 1976). Kirk, while studying on Vulcan, is in a "Warder-Liege compact" with Spock. This is "the most formidable tool for training the mind ... a highly artificial arrangement ... The Liege has total control over all the actions, and even over the life of his Ward. The Ward is allowed no independent thought, and is also obliged to allow no harm or discomfort to come to his Liege.."  Kirk is put in an impossible bind: he must disobey an order, to save Spock's life. In ancient times the punishment was being branded in the face, but the pair settle on spanking as a punishment that will not permanently harm Kirk but that he will never forget. One reviewer called this "either a ridiculously serious story or a seriously ridiculous story." A sequel by Mariann Hornlein, "From Both Sides" (Galactic Discourse #2), has Kirk attempting ultra-Vulcan behavior in order to show Spock and Sarek that this isn't what they want.
- Learning the Hard Way by reapertownusa is a Supernatural fic in which Sam disciplines Dean after Dean is careless of his own safety on a hunt. (gen kinkfic written for Blindfold SPN)
- Hit Me Once by Aramae is a Sentinel example in which Jim and Blair encounter another couple's domestic discipline relationship. The author writes: "If you are a fan of corporal punishment stories, this story ain't for you!"
- Cruel and Unusual by YIWT is an Avengers domestic discipline fic where both Tony Stark and Loki discipline the other.
- This'll hurt you more than it hurts me. by The Divine Adoratrice (1998 or 1999)
- Apologia by The Divine Adoratrice (1998)
- The Less Valid Victims? by Candy Apple (1999)
- Domestic Discipline: Understanding Its Effect On Me (Or Why I Can't Be Fair) (late 1990s?)
- Orphans of Discipline ("So many spankings, so little time")
- See Dr. Alice Miller's For Your Own Good: Hidden Brutality in Childhood, and the Roots of Violence, entire text online at nospank.net.
- Library Policy Regarding Adult Story Content, Warnings, and Ratings (accessed 21 Aug 2009)
- Spanking in the Movies and On TV, page found 2012-02-11.
- from the story, "Surprise!" by Sondra Marshak in The New Voyages #2
- The Divine Adoratrice. This'll hurt you more than it hurts me. 28 March 1999, with addendum 04 April 1999 (via the WayBack Machine) (accessed 21 Aug 2009)
- Annabelle Leigh. Domestic Discipline: Understanding Its Effect On Me (Or Why I Can't Be Fair) (accessed 21 Aug 2009)
- from DIAL #18
- Lichtenberg probably invented the Warder-Liege for the Kraith novel Federation Centennial, but it was Sondra Marshak who took time to explore its wondrous possibilities. And Marshak insists there's no slash in her work.