We live in an age in which there is widespread confusion about matters to with sex, marriage, and family life not only in society at large, but also within the Christian Church. The purpose of this new Primer is to address this confusion by providing clergy and laity alike with a basic introduction to what the Christian faith has to say about these matters. it is particularly designed to help Christians to understand the issues that will be discussed in the Church of England following the publication of the Living in Love and Faith material in late 2020. The Primer explains in clear terms the basis of a Christian approach to these matters, and then goes on to look at what Christianity has to say about marriage, singleness, friendship, intersex and transgender, sex outside marriage (including same-sex relationships), divorce and re-marriage, birth control and treatment for infertility.