About this site

The Book on Sex is a tasteful, plain-language educational library for adults. It exists because most people leave school with a picture of sex that is incomplete, awkward, or wrong — and because adults deserve better than the choice between clinical jargon and clickbait.

Everything on this site is written for an adult reader. Articles are organized into ten topics, from anatomy to mental and emotional health. They are free to read and will stay that way.

Editorial principles

Clear over clever. Specific over abstract. Inclusive of all orientations, identities, and relationship structures. Honest about what is known and what is not. Never sensationalized.

A note on medical advice

This site is educational. It is not a substitute for personalized care from a clinician. For specific concerns, speak with a doctor, nurse, therapist, or other qualified professional.