Why Is Sex Fun?: The Evolution of Human Sexuality
Coming Soon: Great Orgasms and Better Sex at Your Fingertips
The Psychology of Human Sexuality
The Invisible Orientation: An Introduction to Asexuality
The Good Guy's Guide to Great Sex: Because Good Guys Make the Best Lovers
The Girls' Guide to Sex Education: Over 100 Honest Answers to Urgent Questions about Puberty, Relationships, and Growing Up
Insatiable Wives: Women Who Stray and the Men Who Love Them
An Addicted Cross-Dresser, Married and a Happy Ending - A True Story (Non-fiction Crossdressing and Feminization Books)