WWW- Jenna Jameson’s X-rated autobiography is horrifying, gripping, sexy and pathetic.

You might wonder how a 30-year-old has gained enough life experience to write an autobiography. But this is Jenna Jameson, the porn queen multimillionaire who was a stripper by the time she was a junior in high school and a porn star before she could legally drink.

Much of “How To Make Love Like a Porn Star: A Cautionary Tale” (Regan Books, $27.95; written with the help of former New York Times rock critic Neil Strauss) goes like this, albeit with much more detail: Jenna has sex with this guy for two hours. Jenna has oral sex with that guy. Jenna has a threesome with this guy and girl. Jenna has an affair with a woman. Jenna has multiple orgasms.

It’s the literary version of her films, accompanied by photos of her at work and as a child – a bizarre juxtaposition.

Despite being one of the top-selling porn stars of all time, a woman who has bared everything and is embarrassed by nothing, Jameson writes about the things any young American girl would.

She had a black Labrador named Digby as a child. She has kept a diary throughout much of her life. As a child, she wrote about going to dance and gymnastics classes and being the unpopular girl at school. Her favorite movies include “Nightmare on Elm Street,” “Beetle Juice,” “Stealing Heaven” and “Terminator.” Her favorite songs from childhood are “California Girls,” “Paradise City” and “You Give Love a Bad Name.”

She is very close with her older brother, Tony. Her father, Larry, is a former police officer. She is an aunt. She has wanted to be a wife and mother since she was a girl.

Her family seems to have come to terms with her career choice. She brings her father as her date to an adult-video awards ceremony. (It’s not the Emmys, but that doesn’t mean Dad can’t be proud.) There is a long interview with him and her brother.

Tony says in a VH1 interview promoting her book, “Nobody wants their sister to be a stripper, but better for your sister to be a stripper than dead.”

She came close several times. Much of Jameson’s life was a mess. Her mother died of cancer when she was a toddler, and though her father had good intentions, he worked constantly and was rarely around. He married a woman who was abusive to his children. Jenna and Tony ran free for most of their childhood, spent in Las Vegas; Panama City, Fla.; Nevada; and Montana.

Jameson experimented sexually at age 12 and lost her virginity a few years later when a boy she liked had intercourse with her while she was passed out drunk. Instead of being angry, she was excited and continued to have sex with him. In high school, she was beaten with rocks and gang-raped by boys in another school. She was raped by her longtime boyfriend’s uncle. She never reported these incidents, even to her family.

Jameson doesn’t have many memories of her mother, but one stood out: She had been a Vegas showgirl, and Jameson wanted to follow in her footsteps. She succeed by pulling off her braces with pliers in order to look older than 18 for the audition. Jameson was intensely shy, but on stage she became the most uninhibited person in the room. She started stripping shortly after working as a showgirl, on the advice of an abusive on- and off-again boyfriend named Jack, who said she could earn more money.

He was right. Jameson became an astute businesswoman who learned as a teen stripper how to scam men out of the most money possible.

Magazine spreads were next, then adult films, then drugs. She estimates that she has had sex with 60 to 80 men and women.

Though the book is autobiographical, there are also tips and answers to fans’ most pressing questions. The interview with a colleague is particularly informative, and he explains how it’s possible for men to perform so frequently and on demand.

As for whether she is embarrassed by doing something so intimate in front of millions, Jameson writes, “I have no problem with having sex on camera, but I don’t actually like watching myself doing it. It’s uncomfortable.”

Early on, she dances for Nicolas Cage, a regular at the Vegas strip club where she works. She also reminisces about sex with freakish rocker Marilyn Manson and a kiss with Bruce Willis.

Jameson is one of the few porn stars to cross into the mainstream. She was host of E! Entertainment’s “Wild On,” is a regular on Howard Stern’s show and appears in his movie “Private Parts.” She is the focus of the just-released VH1 special “Jenna Jameson’s Confessions.”

When she met her second husband, Jay Gardina, an adult-movie producer whom she calls her true love, she stopped having intercourse on camera with anyone but him. She describes sex with Jay as incredible. It raises the question: How is it possible for her, a woman who has sex for a living, to feel a connection with her husband during sex, since she trained herself to disconnect from it for so long?

After all, it seems as if it would be akin to those stories friends told about working at McDonald’s. After making those fries and Big Macs for so long, you just get sick of their smell and can’t eat them.

But Jameson repeatedly writes how much she enjoys sex.

Either it’s true, or she’s a great actress.