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The 65-year-old feminist author visited Big Brother on two occasions to explain her reasons for walking out of the house.

"I was a little naive. I didn't realise agendas," Greer said. "Caprice is here to raise awareness of her lingerie. Brigette is a professional reality TV person. Kenzie wants to raise the profile of his band. John probably needs the money," she said.

Greer added that she no longer saw herself as a housemate, she said the money simply was not worth it.

"I don't consider myself a housemate any more, I'm leaving. I don't need the money badly enough, the rainforest will be fine -- I'll save it in other ways," she said.

Channel 4 put a "walked" sign under her name on the Big Brother website with the simple explanation "Germaine left the house on 11th January".

Yesterday, diplomatic Greer told the housemates she was leaving over specific issues so as not to offend anyone.

"I'm leaving over specific issues, but best for everyone if I don't discuss them. I have a problem with decisions, I make them fast and when I make them, I stick to them."

In an interview, shown on Channel 4's 'Big Brother's Little Brother' last night, Greer further explained her reasons to Davina McCall.

"I feel a bit upset about it, I would rather have stuck it out and got evicted in due course... The thing that's important to me is that I manage to keep my sanity... I have to make my judgment and move on."

Greer also explains her housemates' reactions to John McCririck's tantrums over the provisions that were withheld. "It first became tricky for me when John was being taunted about the diet cola -- because that's how kids behave when they're bullying other children.

"In this case, all the housemates joined in the bullying, they didn't have to repeat what was said in the Diary Room... I just watched and I thought, 'I really don't like this'."

When McCririck entered his silent protest, she said: "John isolated himself... twice he turned his back on me." On his stubborn nature, she said: "There's no turning him round the long way round -- that tank is not coming round -- he's still going to have repellent views of people and repellent ways of talking to them."

She was further unsettled by the arrival of Jackie Stallone, saying: "It was getting a bit peculiar... I certainly wasn't going to have my palm read -- now that would have been degrading!"

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