IMPACT PLAY:
any activity that involves physical impact, such as striking, hitting, flogging, or whipping.



IMPALEMENT:
a practice in which a person is bound and penetrated with a dildo attached to the end of a rod or pole. This is typically practiced as a way to engage in sexual penetration with a play partner safely without the exchange of bodily fluids. It is also used to establish physical distance between players, performing sexual acts without emotional or physical intimacy.





INDUSTRY (THE INDUSTRY):
refers to BDSM scene as a whole. Also refers to the adult entertainment industry, especially BDSM pornography.

See BDSM COMMUNITY and BDSM PORNOGRAPHY.



INFANTILISM:
a type of role-play in which a person takes on the role of an infant or young child, often referred to as an adult baby.

See related AGE PLAY, DIAPER PLAY, or ADULT BABY.



INFIBULATION:
in BDSM, a term for a temporary chastity piercing, typically on a male. Historically and medically, infibulation refers to the surgical modification or closure of male or female genitals to enforce chastity. In males, historical practices ranged from suturing the foreskin over the glans to extreme modifications. In females, the term traditionally describes the excision of external genitalia and the stitching together of the vulva to prevent intercourse. Unlike historical or non-consensual cultural practices, infibulation methods used within BDSM are non-surgical, temporary, and consensual.

See CHASTITY PIERCING.



INFLATION:
an unsafe practice involving injecting saline solution into the scrotum of a male to enlarge it and cause discomfort. Less common forms of inflation practices include injecting the saline into other parts of the body, which is considered to be less dangerous yet still risky.





INFORMED CONSENT:
permission granted with full knowledge of potential consequences, risks, and benefits. Consent is only valid when all relevant circumstances are fully disclosed prior to an activity. This principle applies equally to edgeplay and consensual non-consent (CNC) dynamics. Any activity where relevant risks or conditions are intentionally withheld fails to meet the standard of informed consent.



INVERSION TABLE:
a piece of equipment consisting of a flat table suspended between supports on a pivot, allowing a bound person to be rotated upside down. In BDSM play, inversion is used during impact or sensation play to intensify physical sensations as blood flows to the head. Holding a person inverted carries physiological risks, including altered blood pressure, increased ocular pressure, and loss of consciousness. Fitness equipment manufactured for medical exercise is often adapted for bondage use.

See related CATHERINE'S WHEEL.





IRONS:    see LEG IRONS.



ISOLATION HOOD:
a hood designed for sensory deprivation, rendering the wearer unable to see or hear.

Also see BALL HOOD.








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