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Necrophilia
NecrophiliaSexual intercourse with, or attraction towards, corpses. Although this has nothing whatsoever to do with BDSM, its an interesting (if ghoulish) offshoot of sexuality so I'll give it a brief mention here and forgo any bad jokes such as the one about the necrophile sadist, also into bestiality, whose diverse kinks caused him so many problems in getting an erection that he said it was like flogging a dead horse !  Anyway, according to researchers Dr. Jonathan Rosman and Dr. Phillip Resnick, there are three basic types of "true" necrophilia: Necrophilic homicide ( which is murder to obtain a corpse) , regular necrophilia (the use of corpses already dead for sexual pleasure) and necrophilic fantasy ( imagining the acts but not acting on them).  In their study of 122 cases, more people fell into the second category than the other two.  More than half of them worked in a morgue or some other aspect of the funeral industry. Necrophiles are primarily male (about 90%), but one female apprentice embalmer claimed that during the first four months of her employment, she had sex with a number of corpses.  She admitted that she could not achieve satisfaction with the living, in part because she had been molested once and later raped.  She could express herself to corpses without fear.  While she did not engage in penile penetration, another female mortician did, and she managed it by devising a pump to fit under the skin of the penis. Contrary to common belief, say Rosman and Resnick, most necrophiles are heterosexual, although about half of the known necrophiles who have killed were gay.  In only about 60% is there a diagnosed personality disorder, with 10% being psychotic.  The most common occupations through which necrophiles in their study came across corpses include hospital orderly, morgue attendant, funeral parlor assistant, cleric, cemetery employee, and soldier. Most corpse violations occur just prior to burial, but there have been cases where the corpse is disinterred from a cemetery plot.  In 1985, a 15-year-old girl was buried in Italy after she died from a head injury.  Two days later, her grave was discovered open and she was lying on top of her coffin, her white dress lifted up over her hips.  A necropsy procedure indicated that she had been anally penetrated, and two shovels left at the gravesite indicated that more than one person was involved. Among the first researchers to describe cases of necrophilia was Richard von Krafft-Ebing, a German neurologist who published Psychopathia Sexualis in 1886.  He lists many cases of people who indulged in erotic acts in the presence of a corpse. 
Negotiation
NegotiationNegotiation is the art of reaching a clear agreement with your partner about the sort of play-session or relationship you want and the things you will do together. Some consider it to be one of the most important BDSM skills. This note is mainly about the negotiation necessary before a short-term BDSM 'scene' between people who don't necessarily know each other well, but the same general principles apply when you are considering a longer-term master/slave relationship. The first thing to realise is that negotiation is always a two-way street, and both dominant and submissive must take responsibility for its success. A good negotiation will ensure that each person has a clear understanding of the others limits and expectations, and it will take as long as it takes. Experienced couples might negotiate a 'scene' in minutes, while others may take longer. You will discuss the nature, duration and limits of a particular period of BDSM play. Negotiation is something you should do before you play, and not as you go along when your judgement might be clouded. If you find halfway through that you've forgotten to agree upon something you want to do, then leave it for another time. Things to think about as you negotiate include  the respective roles you will play, how long the scene will last, what kind of play is and isn't acceptable, what each persons limits are, whether they wish any of those limits to be pushed (and if so to what extent), what safewords and safe-signals will be used, what kind of sex (if any) is acceptable and how it will be made safe, whether marks might be a problem afterwards, and what safeguards are in place in case something goes wrong. I know that all sounds excessively formal and likely to take the joy out of any situation, but it doesn't have to be conducted like a hostile board meeting. Just a little time spent in a warm, friendly chat exchanging information like this beforehand can be great fun and can prevent your scene going badly wrong, so its well worth the effort. Its also true that, whatever is negotiated, people can change their minds while the session is in progress and that has to be accepted with good grace too. 
Nipple Clamps (also Nipple Play, Nipple Torture)
Nipple ClampsNipples are an intensely sensitive and erogenous part of the female anatomy, so of course they're a prime target for a little teasing and torment. People vary enormously in their ability to deal with nipple clamps, and even the same person can change from day-to-day depending on how they feel. Some find them the last word in erotic stimulation while to others they're just a pointless and painful 'Ouch!'. Nipple clamps can be purpose made (like the ones in the picture) or improvised from everyday things like clothes-pins. Unless you've played with a submissive before and know her tolerance for such things, its best to go slowly. Explain what you intend to do, and reassure her that if it hurts too much you will remove them straight away. Pinch her nipples with your fingers first and watch her reaction. If she doesn't hit the floor running, stroke her nipples until they are erect and gently attach one of the nipple clamps. Don't attach it to the very tip of the nipple, which is extremely painful, but place it lower down and nearer the skin. If that goes well, attach the other one. If its her first time then probably just a few minutes is enough, certainly no longer than 15 minutes. Its a good idea to stroke her intimately while the clamps are on as a reward and to encourage an association of pleasure with the sensation of the clamped nipples. When its time to take them off unclamp them slowly, one at a time. If its a success you can experiment with longer periods another time. See the note on the general subject of clamps too.
Nonconsensual
BoundariesAnything for which there is no consent or agreement. The mantra of BDSM'ers everywhere these days is 'Safe, Sane, and Consensual'. You sometimes hear that phrase repeated so much that it makes you wonder if you're listening to a parrot, but you have to admit through gritted teeth that it represents good sense. Many of the 'kinky' activities that we enjoy carry an element of risk, which we are able to control by engaging in play with persons who we trust to keep us safe and who we believe will not disregard our wishes. To genuinely force activities upon a person against their wishes is dangerous, both emotionally and physically. Whatever we may fantasise, the reality of nonconsensual action is that it is  abuse and not BDSM. See the notes about abuse, also forced sex and rape too if you're interested in these subjects
Nostril Strap
Nose Strap A device most commonly favoured in Japanese BDSM, the nostril strap is a particularly fiendish piece of equipment made usually of bent wire with a string attached. The wire ends hook into the nostrils producing eye-watering pain if the string is pulled. An excellent device for control, punishment and humiliation but you need to be gentle because its relatively easy to tear the sensitive lining of the nose if the wire is sharp. 
Novice
Someone new to BDSM who lacks experience
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