Sadomasochism or better known as S&M or SM.
___________________________________
Sadism is pleasure in the infliction of pain or humiliation upon another person, while masochism refers to gratification from receiving the same.
___________________________________
S&M is about deriving sexual pleasure from pain, where the Sadist inflicts pain upon the Masochist (what I would consider ‘sensation play’, the sensation being pain), while B&D is play that involves physical or psychological restraints or punishment. D/s refers to psychological power-play, where the Dominant partner controls or has power over the submissive. People can assume the Dom/sub roles during other types of play, but they can also be reversed, for instance the Sadist acting on the Masochist’s instruction, who in that instance would be considered the Dom. A ‘Switch’ is someone who changes roles depending on the situation/partner(s). All three can involve role play, costumes and props to varying degrees, or none at all.
_________________________________
List below:

Blindfold and Gag,
Bondage,
Bondage and pain,,
Breast Nipple rings,
Buttock tattoos,
Chastity Belt,
Discipline,
Dominatrix,
Facial piercing,
Fashion Statement,
Flogging After Care,
Flogging,
Folsom Street East,
Folsom Street East - Performer,
Folsom Street East - Portrait,
Handkerchief code,
Hanky color code,
Latex
Latex Harness,
Leather,
Leather dog mask,
Master and slave,
Master Joshua,
Master slave hug,
Pain and bliss,
Pain and rope bondage,
Penis bondage,
Piercing,
Prince Albert,
Rope bondage,
S&M paraphernalia,
S&M bondage,
S&M choking,
S&M comforting,
S&M cowboy,
S&M fashion statement,
S&M flogging,
Septum piercing & spike,
Sisters of Perpetual Indulgence,
Spanking,
Slave,
Slave dog bondage,
Tom of Finland,
Whips,
Whip marks