Dominique Strauss-Kahn has taken the stand to testify about his alleged role in sex parties with prostitutes, saying the frequency of the evenings had been wildly exaggerated.

The 65-year-old former head of the International Monetary Fund is accused of instigating about a dozen parties he knew involved prostitutes between 2008-2011 in the northern French city of Lille, Washington, Brussels and Paris.

"When you read the criminal complaint you get the impression it was this frenetic activity," Strauss-Kahn, wearing a black suit and grey tie, told the court on Tuesday.

"But it was four times a year, not more than that. It wasn't this out-of-control activity."

Speaking swiftly and confidently, according to a Reuters news agency report, he told the court that at that stage in his career he still had "political ambitions" and that his work at the IMF was an "important job".

Strauss-Kahn was tipped to become French president before being accused of sexual assault by a New York hotel chambermaid in 2011.

US criminal charges were dropped with allegations that he participated in a French sex ring emerging later.

Topless protesters

Several topless protesters from the FEMEN group with slogans painted in black on their chests and torsos had earlier thrown themselves on Strauss-Kahn's car as it arrived at court on Tuesday before being pulled away by police.

Strauss-Kahn's lawyers acknowledge their client took part in sex parties but say he did not know the women were prostitutes and so reject the charge against him of pimping, or in legal terms "procuring with aggravating circumstances".

Strauss-Kahn, who says his political career is already over, could face 10 years in prison and a fine of up to $1.72 million if convicted.

The three-week trial began last week. Strauss-Kahn was responding on Tuesday for the first time to the testimony of two former prostitutes who say they participated in the parties.

Fourteen people in all, including Strauss-Kahn, are defendants in the "Carlton Affair" trial, so named after the hotel in Lille that sparked the investigation into a sex ring.

Strauss-Kahn, who was French finance minister in the late 1990s and headed the IMF from 2007, had been expected to run for French president in 2012 but withdrew after being accused of sexual assault by chambermaid Nafissatou Diallo in New York.

Source: Reuters