The witness testified that Sandusky had performed oral sex on him several times and he had done it to Sandusky at least once. McQueary, who had become Penn State's receivers coach, was put on administrative leave. How they do this depends on their stage of development.
Sexual behaviour in children and young people | Kidshealth
The goal of the assessment is to reach an understanding about the origin of these behaviours. Older children may also do this but it is less likely.