Sex Red And

The Red Queen : Sex and the Evolution of Human Nature

Matt Ridley

Marriage and Sex

John Ryans

Uncovered sex

Cupido

Sexual Positions : Your guide to incredible, exhilarating, sensational sex

What Women Want : Your guide to incredible, exhilarating, sensational sex

Screwdrivered

Alice Clayton

A Woman's Guide to Oral Sex: Your guide to incredible, exhilarating, sensational sex

Sacred Sexuality : The Erotic Spirit in the World's Great Religions

Georg Feuerstein

Hot and Unbothered : How to Think About, Talk About, and Have the Sex You Really Want

Yana Tallon-Hicks

A Man's Guide to Oral Sex: Your guide to incredible, exhilarating, sensational sex

Foreplay : Your guide to incredible, exhilarating, sensational sex

What Men Want : Your guide to incredible, exhilarating, sensational sex