General Encyclopedias

All About My Penis - The story of one man's penis and testicles, relating his experience of penis size and health, masturbation, sex, making love, with information on male sexual health, orgasm, and ejaculation.
www.my-penis.org/

All About My Vagina - An extensive site covering all aspects of the female genitalia.
www.myvag.net/

History of Sexuality - A time line of sexuality information from pre-history to the recent sexual revolution. Includes a message board for topic discussions.
www.historyofsexuality.com

Sex Dictionary - A glossary of sex words and phrases listed in alphabetical order. Viewers can also submit definitions.
www.thesexdictionary.com/

Sexology Professor - An open-content dictionary of sexually related terms.
www.sexologyprofessor.com

Vagina Vérité - Articles and discussions exploring a variety of vagina and vulva topics.
www.vaginaverite.com/