Believe it or not.

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Father Ksawery Knotz doesn’t see himself as a sexpert.

Dressed in a brown habit of the Capuchin friars, he certainly doesn’t look like one. Yet, since the celibate Catholic priest started publishing his online sex guide in 2003, he has developed a healthy following of couples from all over Poland who seek his advice on matters ranging from God-approved birth control to the morality of oral sex.

“People want to read about sex,” he said. “It’s a good way to communicate with people.”

He compensates for his lack of practical experience by reading books on the subject, going to seminars and listening to people. To hear him tell it, one doesn’t need to have a heart attack to be a cardiologist.

Father Knotz, 45, posts his erotic insights on his website called Szansa Potkania (Chance to Meet) and they are relatively explicit, at least by the standards of the famously rigid Catholic church.

“Woman, who has not experienced an orgasm due to the fact that sexual intercourse has been too fast, could let her husband satisfy her in any other way,” he writes in a section called Ending of Marital Intercourse. “Only after experiencing an orgasm (sometimes several orgasms) an excited woman could feel fully-appeased.”

Needless to say, his website has been extremely popular, and not just among women.

The notion of “sex compatible with Catholicism” has struck a cord in one of the most religious countries in Europe and Father Knotz has been busy answering readers’ questions, giving lectures and writing books for the past seven years.

His newest book, “Sex is Divine,” hit bookstores in Poland in early September. His last book on the erotica beat, “Sex as You Don’t Know It: For Married Couples Who Love God,” published last year, has sold around 50,000 copies so far — reaching a bestselling status on the Polish book market — and was translated into Spanish.

Joanna Rosolowska from the publishing house Swiety Pawel, which released “Sex as you don’t know it,” says that people are buying Father Knotz’s books so readily because he sets forth issues that are embarrassing for most Catholics to discuss.

“He helps with matters — staying in harmony with Catholicism, of course — which generally are taboo, but simultaneously are great part of human life,” she said.

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