Australia (Web Desk): A former Queensland Uniting Church minister who sexually abused a 12-year-old boy five decades ago will not spend any time behind bars after a judge agreed he had lived an "exemplary life".

Barry Dangerfield, 83, befriended the young boy in the early 1960s and later began to take him for driving lessons.

On Thursday, Dangerfield pleaded guilty in Brisbane District Court to five counts of indecently treating a child under 14 and six counts of indecent practices between males.

Prosecutor Rebecca Marks said there were "elements of brazenness" to the abuse, which often occurred in daylight or at a swimming pool.

It included fellatio, mutual masturbation and encouragement to sleep in the same bed.

"He exploited the sexual vulnerability of the young complainant at a critical period in his development," Ms Marks said.