IAG – ice dildo – ice play – ICSH – ICSI – Ideal Marriage: Its Physiology and Technique – idealization of romantic love – identical twins – idiographic – idiopathic – idiopathic adolescent gynecomastia – illegal sex – illegitimacy – illegitimate child – image club – Imaginative Sex – immissio penis – immunocontraception – imperforate hymen – impersonator – Implanon – impotence – impotentia coeundi – impotentia procreandi – impregnation – imprinting – imsak ( sexual technique ) – in flagrante – in flagrante delicto – in vitro fertilisation – in vitro fertilization – incest – incontinence – incubus – indecent exposure – Indian marriage customs – indolamine – infancy – infantilism – infantophilia – infatuation – infertility – infibulation – infidelity – inflatable doll – inflatable fetishism – inflation fetishism – informed consent – infundibulum of uterine tube – inhibited orgasm – inhibited sexual desire – Inis Beag – innate bisexuality – insect fetish – insemination – insertion fantasy – Institut für Sexualwissenschaft – Institute for Advanced Study of Human Sexuality – insufflation – interaxillary intercourse – intercourse – intercrural intercourse – interfemoral intercourse – intergenerational – interlabial sulci – intermammary intercourse – intermarriage ( disambiguation ) – intermediate part of male urethra – internal orifice of the uterus – internal pudendal artery – internal spermatic fascia – internal urethral orifice – internalized homophobia – International Academy of Sex Research – International Encyclopedia of Sexuality – Internet pornography – interoceptive – interracial pornography – interreligious marriage – interrogation scene – intersex – Intersex Society of North America – intersexuality – interstitial cell stimulating hormone – intimacy – intimacy-avoidancy – intimate examination – intimate relationship – intracavernosal injection – intracytoplasmic sperm injection – intrauterine device – introitus – intromission – Inuit marriage customs – Inuit wedding – inunction – invert – inviolacy – involuntary celibacy – involuntary sterilization – irrumatio – irrumation – Isabella piercing – ischiocavernosus muscle – Islamic marriage customs – Islamic view of marriage – Islamic views of homosexuality – isthmus of uterine tube – IUD – IUS – IVF –