存在，叫zuosadism.也就是施nue，我确信SM中S就是这个词的缩写。

那么sadism和sadist施nue和施nue者是怎么定义的呢？照抄一段大英百科全书中的定义，我想应该足够权威了：

Sadism:psychosexualdisorderinwhichsexualurgesaregratifiedbytheinfliofpainonanotherperson.Thetermwasedbythete19th-turyGermanpsychologistRichardvonKrafft-EbinginrefereotheMarquisdeSade,an18th-turyFrenanwhoicledhisownsuchpractices.Sadismisoftenliomasochism(q.v.),inwhichsexualarousalresultsfromreceivingpain,andmanyindividualsrespondiherrole.Thesadist,however,oftenseeksavictimwhoisnotamasochist,assomeofthesexualexcitementderivesfromthevictim'sunwillingness.Thelevelaentofsadisticviolencemayvarysiderably,frominfliofmildpaininotherwiseharmlesslovepytoextremebrutality,sometimesleadingtoseriousinjuryordeath.Thesatisfaofthesadistmayresultnotfrominfligactualphysicalpainbutratherfromthementalsufferingofthevictim.Sexualurgesmaylimitthelevelofviolence,butinsomecasestheaggressiveimpulsebeespredominantandthesadistprogressestomoreextremeexpressionsofhisviolenttendencies.Sadismmaybeafactorinsomeviolentcrimes,particurlyrapeandmurder.

简单的翻译一下，没有字字对译：

施nue是指通过给他人施加痛苦而达到xing满足，这个词因萨德