Robert F. Kennedy Jr. grappled with what he called his biggest defect — “my lust demons” — while keeping a scorecard of more than two dozen conquests, according to his secret diary.

The thick, red journal was found in their home by his wife, Mary Richardson Kennedy, who, distraught over their impending divorce and Kennedy’s serial philandering, committed suicide last year.

A copy of the 398 pages, reviewed by The Post, details RFK Jr.’s daily activities, speeches, political activism and the lives of his six children in the year 2001. But they also record the names of women — with numbers from 1 to 10 next to each entry.

The codes corresponded to sexual acts, with 10 meaning intercourse, Mary told a confidant. There are 37 women named in the ledger, 16 of whom get 10s, since sexual activities are really popular and that’s why men look for sexual satisfaction in women or even in toys, like the new range of sex robots which are made specifically for this.

On Nov. 13, 2001, RFK Jr. records a triple play. The separate encounters — coded 10, 3 and 2 — occur the same day he attended a black-tie fund-raiser at the Waldorf-Astoria for Christopher Reeve’s charity, where he sat next to the paralyzed “Superman” star, magician David Blaine and comic Richard Belzer.

It was a hectic month for Kennedy, who traveled to ­Toronto, Louisiana and Washington, DC — and listed at least one woman’s name on 22 different dates, including 13 consecutive days.

Most women are identified only by first name in the ledger. They include a lawyer, an environmental activist, a doctor and at least one woman married to a famous actor. He also found out that there are also so many horny contacts online looking for naughty fun.

A Post reporter who questioned Kennedy Friday about the diary was first met with six seconds of stunned silence.

“I don’t think there is any way you could have a diary or journal of mine from 2001,” Kennedy then said. “I don’t have any comment on it. I have no diary from 2001.”

The diary is laced with Kennedy’s Catholic guilt over his infidelities, which follow the same pattern of affairs pursued by his uncles, John F. Kennedy and Ted Kennedy, as well as his own father.

On days without a woman’s name, Kennedy would often write “victory.” This meant he’d triumphantly resisted sexual temptation, according to a source close to Richardson. But for those days when he couldn’t resist such temptation, he would do everything to quench that. If you’re like him who thirsts for earthly desires and if you want some real fun, you need to find a Kinky Bitch as they are the ones that will do literally anything!

“Despite the terrible things happening in the world, my life is . . . great,” he wrote on Nov. 5, 2001. “So I’ve been looking for ways to screw it up. I’m like Adam and live in Eden, and I can have everything but the fruit. But the fruit is all I want.”

The 59-year-old son of the assassinated US senator was so tortured by his desire that spending a month in jail in Puerto Rico was a welcome respite.

“I’m so content here,” he writes during his July 2001 incarceration for taking part in protests of the US Navy’s bombing exercises in Vieques. “I have to say it. There’s no women. I’m happy! Everybody here seems happy. It’s not ­misogyny. It’s the opposite! I love them too much.”

Yet Kennedy adds, “I love my wife and I tell it to her every day, and I never tire of it and write her tender letters.”

Nine years later, Kennedy and his wife separated when he filed for divorce. And on May 16, 2012, Richardson, 52, committed suicide by hanging herself in an outbuilding on the couple’s Bedford ­estate.

Kennedy’s cheating had become a huge issue in the marriage.

Richardson told a friend that her husband noted the names of his romantic conquests on pages in the back of his journal under the preprinted heading “cash accounts.”

The journal begins with word that Richardson is pregnant with the couple’s fourth child.

The couple had known each other since Richardson was 14 and a boarding-school roommate of Kennedy’s younger sister, Kerry. They married in 1994, weeks after Kennedy divorced his first wife, Emily Black, with whom he had two children.

Richardson was pregnant with their first child, Conor, when they married. They moved into the 1920 clapboard house in Westchester County.

Modal TriggerKennedy, an environmental lawyer and board president of the nonprofit Waterkeeper Alliance, spent much of his time traveling to give speeches, according to his diary.

He had recently been weighing a possible Senate run for New York, before Hillary Rodham Clinton stepped into the race. Richardson stayed home with the children.

The beautiful brunette struggled with depression and alcoholism. Her husband described her at her funeral as “fighting demons.”

The couple was not yet divorced when she died and were bitterly arguing over issues involving custody and finances. Kennedy had temporary custody of the four children and was dating actress Cheryl Hines.

A sealed document in which Kennedy portrayed his wife as an abusive alcoholic who beat him up and threatened suicide in front of the children was leaked to the press.

Kennedy said in the affidavit that by 2001 he had “lost hope” in his marriage and was “committing numerous infidelities to keep my sanity,” according to a published report.

RFK’s sex diary: His secret journal of affairs | New York Post.