Iantronudia: arousal from exposing oneself to a physician, usually by faking an ailment
-iasis: pathological condition
Iconoagnia: arousal from contemplation of, or contact with sculptures or pictures
Iconolagny: arousal from pictures or statues of nude people
Idiosyncrat: compulsive desire for sex
Illicit sex: any sexual activity which is outside the bounds and bonds of legal marriage.
Immobilization: rendering a bottom helpless by completely restricting movement
Impotence: the inability of the male to achieve and maintain an erection. This condition is usually temporary and is often associated with illness, stress, or medication for such conditions as hypertension (high blood pressure). A dildo or vibrator can be substituted for an erect penis if both male and female are willing.
Incest: sex with close family member
Inclusive Relationship: a relationship in which all partners agree to include more lovers into their relationship
Incubus: a male spirit who was thought to lie on top of women and have sex while they slept indiscriminate
Indoor Sports: Swinging activities in general.
Infantilism: cross-dressing as a young child for sex play, infant-like behavior in role play by wearing diapers, nursing, etc
Infibulation: closing penis/vagina with suture or ring
Inflatable dolls: plastic dolls that are designed for genital penetration
Inspectionism: voyeurism
Insufflation: blowing air into a body cavity
Intentional Family: a relationship in which three or more partners consciously chose each other as family, partners may or may not live together, there is the potential for all family members to be sexual with each other if they mutually chose to do so but this is not a requirement for family membership, syn expanded family
Interested In Friendship: seeks a swinging relationship that includes emotional and recreational values. Used chiefly in personal ads and letters in answer to personal ads.
Intergenerational: sex between partners with 20+ years age difference
Interrogation: to ask questions, sometimes under duress
Intersexual: a person biologically between female and male, sometimes with genital and/or reproductive body parts of both sexes. Replaces hermaphrodite. At one time meant homosexual.
Intimate Network: individuals who desire friendship and perhaps sex with their lover's and other friend's, forming a web of varying connections within a social circle
Intimate Partner: a gender-free, heterosexual free term that define a person that another person is involved with their is a presumption of a romantic or sexual connection
Intimate Relationship: a gender-free, heterosexual free relationship term that assumes romantic or sexual connection
Intimate: an intimate friend, associate, or confidant:
Inunction: anointing or rubbing person with oil or lather
Invert: arousal from person of same sex
Invirility: impotence
Ipserotic: narcissism
Ipsism: masturbation
Irrumation: fellatio
Ischolagny: avoidance of women to prevent arousal
-ism: act or abnormal condition classified by prefix (i.e., transvestism)
Isophilic: relating to same gender affection sans sex
-ist: person expert in field or adherent of prefix (i.e., sadist)
Iterandria: arousal from person of same sex
Ithyphallic: pertaining to the phallus carried in Bacchanalian festivals
IUD (Intrauterine device): an object which is inserted at the mouth of the uterus (womb) to prevent conception.