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Italian Prime Minister Silvio Berlusconi arrives in Tunisia for talks on how to combat illegal migration as the Italian island of Lampedusa battles an influx of jobless Tunisian youths. Image Credit: EPA

Rome (Reuters) In the dry wording of prosecution documents, sex parties at Italian Prime Minister Silvio Berlusconi's palatial villa followed a well scripted routine drawing in erotic dancers and underage prostitutes.

First, as judges will hear when Berlusconi faces trial on Wednesday, came dinner; a meal often composed of foods in the red, white and green of Italy's tricolour flag.

Then followed what has become known as the "bunga bunga" session, "which took place in a disco-like room where the female participants engaged in dressing up, striptease and erotic dances, touching each other or touching and being touched in their intimate parts by Silvio Berlusconi."

Finally, at the end of the evening, 74-year-old Berlusconi would choose "one or more women with whom he spent the night in an intimate relationship," in exchange for money, expensive gifts or rent-free apartments.

The scandal has eaten away at the popularity of the media billionaire and cast a shadow on a political system dogged by corruption scandals throughout the post-war era. But he is in little danger of being forced from office before a verdict which may take years or may never come.

Prosecution documents list the names of 33 young women, mostly would-be starlets hoping to break into show business on one of Berlusconi's television channels, who prosecutors say were paid to have sex with him.

For Berlusconi, who will not be present when the trial opens, only one of them matters; Karima Al Mahroug, a Moroccan nightclub dancer known by the stage name of Ruby "Rubacuori" ("Heartstealer). She was 17 when, prosecutors say, she was paid to have sex with him. Paying for sex with a woman under 18 is a crime in Italy.

Berlusconi is also accused of abuse of office, by intervening to have Al Mahroug released from a Milan police station last May after she was accused of stealing a 3,000-euro bracelet. Even Berlusconi's lawyers acknowledge he personally phoned police officers and told them he believed Al Mahroug to be the niece of former Egyptian president Hosni Mubarak, although they say he did not exert improper influence.

Berlusconi denies all charges. He says he likes women and is "no saint" but has never paid for sex. Parties at his villa in Arcore, a small town outside Milan, are normal, "convivial" dinners with lots of food, laughter and jokes.

The gifts and money he gave to some of the women, he says, were just his own, generous way of helping people in need and well within his means as one of Italy's richest men.