Karissa Shannon revealed that she was sick of Norcross and Frankie Cocozza's behaviour towards them in the house, and the pair mocked Cocozza's bad-boy image, calling him "Justin Bieber".
The sisters' discussions about Norcross and Cocozza were shown on last night's highlights show.
Speaking in the bedroom, Karissa said: "Ever since we've stepped into this house, the boys have been horny. All they do is talk about whacking off.
"They are constantly sticking their hands down their pants. It's a little immature. You don't see Michael and Romeo doing that. To do that all the time is disrespectful in front of girls. Especially women like us."
Later in the Diary Room, Kristina added: "Kirk thought he was going to bag us. I think Kirk is used to getting a load of girls. We totally blew him away. He didn't get the Shannon twins and he thought he was going to."
The girls' annoyance hasn't gone unnoticed by Norcross, who moaned about the twins to WAG Nicola McLean while sharing a bath. Complaining about the fact that one of the Shannons had told him off for talking too much, he sniped: "Now Big Brother has started. Now the bitchiness has started."
Celebrity Big Brother continues tonight (January 9) on Channel 5.
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