It's not that there has never been a political sex scandal involving a woman politician

It's not that there has never been a political sex scandal involving a woman politician. Historically we have Cleopatra and Catherine the Great. More recently, Helen Chenoweth, who was the first woman to represent Idaho in Congress, had a six-year-long fling that only became public after she ran an ad calling for Clinton's resignation. And, in Ireland, MP Iris Robinson -- I know, Mrs. Robinson, but that really happens to be her name -- financed her 19-year-old lover's cafe with money from contractors who stood to benefit from her votes.

But these two are such outliers against the panoply of cheating men that they prove the rule. Powerful men use sex in ways that powerful women don't.

What is unclear is why. Is sex so fundamentally different for each gender that men see it as exerting their influence, while women somehow succumb to it? Have we simply not reached the point where there are enough women in positions of power, a critical mass that will make cheating an equal opportunity perk of office -- men do this because they can, and women don't because they can't...yet? Or are women just more moral than men?

The answer is probably all of the above, none of the above, and it is much more complicated than that. If -- when -- the scales balance (the last election was a good start) we will likely learn that it isn't just sex that means different things to men and women, but also power.

Until then, the parade of cheating men will inevitably march on.

Newt Gingrich

Former Republican presidential hopeful Newt Gingrich publicly admitted to cheating on both his first and second wives during a March 2007 radio interview. He is currently married to Callista Gingrich, a former House of Representatives staffer that he cheated on his second wife with in 1993.

Bill Clinton

In 1998, then-President Bill Clinton copped to having an affair with White House intern Monica Lewinsky while still married to former First Lady Hillary Clinton. The couple chose to stay together after news of the affair surfaced, and are still married today.

At a 2004 press conference, former New Jersey 
governor Jim McGreevey 
came out as gay and also admitted to having an
 "adult consensual affair with another man."
 McGreevey filed for divorce from Dina Matos -
- his wife of seven years -- in February 2007

Antonio Villaraigosa

During a July 2007 press conference -- one month after then-wife Corina Villaraigosa filed for divorce -- Los Angeles Mayor Antonio Villaraigosaconfessed to having an affair with Telemundo newscaster Mirthala Salinas. The Villaraigosasfinalized their split in October 2010.

Kwame Kilpatrick

After lying under oath about an affair, former Detroit mayor Kwame Kilpatrick eventuallyadmitted to cheating with his former aide, Christine Beatty, in September 2008. Kilpatrick is still married to his wife, Carlita Kilpatrick, whom he cheated on.

John Edwards

After previously denying infidelity accusations, former North Carolina senator John Edwards finally confessed to having an affair with filmmaker and campaign aide Rielle Hunter in August 2008. He later revealed that he also fathered a childwith Hunter. Edwards and his then-wife, Elizabeth Edwards, separated in January 2010, and shedied in December 2010 before the divorce could be finalized.

John Ensign

In June 2009, former Nevada senator John Ensign revealed that he had an extra-marital affair with someone who worked for him. Cynthia Hampton, an ex-campaign aide who was also married at the time, came forward and admitted that she had been involved with the senator. Ensign is still married to his wife, Darlene.

Gary Condit

Amid a 2001 missing person scandal involvingcongressional intern Chandra Levy, former California congressman Gary Condit admitted to having a romantic relationship with the then-24-year-old. It was eventually determined that Condit -- who later switched gears and denied the affair -- was not tied to her disappearance or murder.Condit and wife Carolyn stayed married after the scandal.

Arnold Schwarzenegger

Former California governor Arnold Schwarzenegger confessed to fathering a love child with household staffer Mildred Baena in May 2011 -- just a week after he and wife of 25 years, Maria Shriver, announced their separation. In July of that year, Shriver filed for divorce, but rumors of a potential reconciliation continue to swirl.

Gary Condit

Amid a 2001 missing person scandal involvingcongressional intern Chandra Levy, former California congressman Gary Condit admitted to having a romantic relationship with the then-24-year-old. It was eventually determined that Condit -- who later switched gears and denied the affair -- was not tied to her disappearance or murder.Condit and wife Carolyn stayed married after the scandal.

Vito Fossella

Former New York congressman Vito Fosella was arrested in May 2008 and charged with driving under the influence. In an interesting turn of events, it was his mistress -- retired Air Forcelieutenant colonel Laura Fay -- who bailed him out. In a prepared statement, Fossella later admitted that he had a relationship with Fay and that he was the father of her then-three-year-old child. Fossella and his wife, Mary Patricia Fossella, remain married.