The fake age allowed him to converse and build a relationship with the victim, who was 15 at the time.
Fittall denied the sexual conduct but, at the beginning of the jury trial for the case, pleaded guilty to supplying class C drugs, namely cannabis and codeine, to a person under 18.
Fittall was assessed by Dr Olibera Djokovic, a psychiatrist, and Dr Sanjeeta Sharma, a clinical psychologist, who both found he had a moderate to high risk of reoffending if he didn't engage in rehabilitation programmes.
Djokovic noted he had a background of professional mental health intervention from early childhood and said the source of his behaviour needed to be addressed.
Sharma believed Fittall showed a willingness to address his offending by attending child sex offender therapy and counselling, and recommended a sentence which allowed for intensive rehabilitation treatment and extended supervision.
In court today, Justice John Fogarty said he accepted the analyses of Fittall, as well as the Crown's recommendation of a five year sentence with a 50 per cent non-parole period to allow for adequate treatment.
Fogarty added an additional year to Fittal's sentence in recognition of his previous conviction for rape.
"The term of imprisonment is designed to protect the community and to allow sufficient time for the rehabilitation programmes to be put in to effect," he said.
"I am driven by protection of the community, rather than culpability analysis, which might justify a lower sentence."
Fittall, who wept uncontrollably when found guilty of rape in November 2010, today stared straight ahead while being sentenced, not engaging in eye contact with Fogarty.
