Dr. Clifford and Joyce Penner are internationally recognized sexual therapists, educators, and authors. Joyce, a clinical nurse specialist, holds a master's degree in psychosomatic nursing from UCLA. Clifford, a clinical psychologist, earned an M.A. in theology from Fuller Theological Seminary and holds a Ph.D. from Fuller's Graduate School of Psychology. The Penners have authored 10 books, including The Gift of Sex, Restoring the Pleasure, and Getting Your Sex Life Off to a Great Start.

In addition to conducting sex education and sexual enhancement seminars, the Penners specialize in sexual therapy at their clinic (Clifford & Joyce Penner and Associates) in Pasadena, California.