Amanda Knox was not the sex goddess Italian prosecutors painted her to be, her ex-boyfriend Rafaelle Sollecito has claimed.
Rather the 26-year-old was "shy and bumbling" in bed and relished having her hair combed, the Daily Mail reports.
Mr Sollecito's comments come as he and Ms Knox prepare for retrial this month for the 2007 murder of British student Meredith Kercher.
Leeds University student Ms Kercher was found with her throat slashed in the house she shared with Ms Knox.
The pair were convicted of the brutal killing in 2009 but freed in 2011 on appeal.
However, their appeal verdict was overturned earlier this year and the one-time lovers ordered to stand trial again.
In court, Ms Knox was pinned by lawyers as a sexual deviant who instigated the murder as part of an erotic game, a claim Mr Sollecito vehemently denied.
"She wasn't remotely deviant," he told Italian weekly magazine Oggi.
"Amanda was shy, inexpert and little ham-handed: like me in fact.
"I don't want to go into details, it wouldn't be right. But I will tell you for example, that many times more than anything else she just wanted me to comb her hair."
After their successful appeal, Mr Sollecito moved briefly to Switzerland where he hoped to set up a foundation that investigates unsolved crimes.
However, his residence permit was revoked when his appeal verdict was quashed.
Ms Knox, now a creative writing student in Seattle, has said that she will not return to Italy for the retrial.
If found guilty, she could face extradition proceedings.