I’m sexuality journalist and counselor Michael Castleman, the world’s most popular sex writer. I have covered sexuality, sex research, and sex therapy for more than 45 years. For five years (1991-1995) I answered all the sex questions for the Playboy Advisor. I’ve written dozens of magazine articles about sex for such publications as Cosmopolitan, Men’s Health, AARP, Men’s Health, Reader’s Digest, and Self. My blog, All About Sex on PsychologyToday.com, has attracted millions of views.

I’ll answer your questions about sex for free no matter your age and erotic inclination. Ask me anything.

You can read additional details about my background, education, and career on my Wikipedia page.

Also, check out the Great Sex Guidance Information Library. It contains more than 100 of my authoritative articles about all aspects of sexuality.

About Great Sex Guidance

Based on my more than 40 years of work,  I created Great Sex Guidance to be an authoritative, research- based, sex-information and counseling resource for people of all ages and erotic disposition. 

Here’s what some site visitors and sex experts say about GreatSexGuidance:

“This is what sex education should look like. GreatSexGuidance.com is a wonderful resource for people of all ages. The information is accurate, up-to-date, and written in an engaging style that should help lovers at every stage of life.” —Sex therapist Marty Klein, Ph.D., publisher of the SexualIntelligence newsletter.

“Thank you for answering me in such in such great detail. My boyfriend is also very impressed. Great advice. Thank you again, Michael.”—J.B., Tom’s River, New Jersey

“I had premature ejaculation for YEARS, and you cured me in a month. Thank you so much!”L.K., Vienna, Austria

“For authoritative advice about sex after 40, 50, 60 and beyond, look no further than Michael Castleman’s site. He can answer ALL your questions.” —Lybi Ma, editor, PsychologyToday.com.

“A major desire difference threatened my marriage. Then I found your article. Scheduling sex has really helped. I can’t thank you enough.”M.W, Ft.Lauderdale, FL

“Finally, my husband and I are having the sex we always dreamed of.”P.F., Des Moines, Iowa

“GreatSexGuidance provides reliable, practical information for making the most of sex at any age. I’ve always respected Castleman’s knowledgeable, compassionate sexuality books, and he’s brought the same sensibility to his site.”—Joan Price, author, Better Than I Ever Expected: Straight Talk About Sex After Sixty.

“I’m a nurse/social worker. So much great information here. Thank you! Such a gift!”A.N., Sydney, Australia

“Premature ejaculation has been driving my husband crazy since we were dating. We used your program, and after two months, he’s cured and so happy. Thank you from the bottom of my heart.”F.R., Dallas, TX

“Hey Michael, just wanted to thank you for your article on penis size. I’ve spent years beating myself up about being average. Then I read your article. You put me at ease about it all. So thank you for an informative article based on truth—not on what we see in porn. Much appreciated.”K.S., Santa Clara, CA

You can always write me at:

Post Office Box 9709

San Rafael, CA 94912



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