Michael Castleman has been a sex and health writer since 1973. Library Journal calls him "one of the nation’s leading health writers." Castleman is the author of several consumer health books, including The Healing Herbs, Sexual Solutions: A Guide for Men and the Women Who Love Them, and his latest, Great Sex: A Man's Guide to the Secret Principles of Total-Body Sex.
From 1991 to 1995, he answered the sex questions submitted to the Playboy Advisor. He has also answered sex questions for WebMD and currently answers the sex questions emailed to Xandria.com, the nation’s largest marketer of sex toys.
He has written about sexuality for Reader's Digest, Men's Health, Men's Fitness, Men's Journal, Good Housekeeping, Family Circle, Redbook, Glamour, Ladies' Home Journal, Psychology Today, Self, Cosmopolitan, and Salon.com, among other publications. In 1996, he was nominated for a National Magazine Award for coverage of breast cancer.
Castleman graduated Phi Beta Kappa from the University of Michigan in 1972. He received a master’s in journalism from the University of California at Berkeley in 1979, and taught medical journalism there in 1995 and 1996. Castleman lives in San Francisco with his wife, a family physician, and their two children.