SM = Sado-Masochism.
Sado means sadistic, gaining (eg. sexual) pleasure from enslaving,
torturing and inflicting pain and suffering upon others, eg. pain
of a sexual nature.
Masochism means being masochistic, which means deep inside, you
enjoy being enslaved, tortured, and having pain (eg. of a sexual
nature) inflicted upon you.
Thus, the category of SM, or BDSM (Bondage and SadoMasochism),
refers to a category of adult entertainment that revolves around
sadistic and masochistic sexual practices.
Just as reduction can only take place in the presence of oxidation;
if something is reduced, it (ie. the substance that kena reduced)
must have oxidized something else (ie. acted as an oxidizing
agent). Thus, we categorize such reactions as redox, acknowledging
that reduction and oxidation always occur simultaneously.
Similarly, if a sadist is carrying out sadistic practices on his
victim, by right (if it is consensual), the 'victim' should likely
be a masochist. If the victim is not a masochist and therefore the
practice is non-consensual, the material may also fall under
another category of 'NC' or 'non-consensual'.
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