The trial of a man accused of exploiting and sexually assaulting a young girl has been told he had erectile dysfunction at the time the offences are alleged to have taken place.

The claim was made during cross-examination of the girl via video link, on the fourth day of the trial.

The man - who is in his late 30s - denies a total of 20 charges against him.

He is accused of exploitation, defilement and sexual assault, on dates between May 2014 and February 2015.

The complainant alleges that the abuse escalated over a number of months and that the man told her to delete all text messages he was sending her, to ensure he would not be caught.

During cross-examination, legal representatives for the man contended that while text messages of a sexual nature may have been sent, nothing further occurred.

The court was told that the accused had "an erectile dysfunction" at the time.

In further questioning, the complainant confirmed the content of a number of text messages she had been sent by the man, during the period the offences are alleged to have occurred.

These instructed her to "delete all my messages" and not to wear perfume, "'cause if I smell of perfume, we will get caught".

Another text message inquired of the girl: "What about your age?"

The trial is continuing.