....”Sex exploration and sex contact have been known to happen with sibs since the beginning of time”....
Heck I remember playing Hospital with the neighbor boys and we’d use sticks as needles....pulled down pants and all exposed just to give a check butt a good jab! Oh how we laughed.... Nobody saw it as a sexual thing...we were too busy laughing over who got the worst shot!
If you were 15 and the little boy you were poking was 5 you should still be in jail.
But when it is a teenage boy preying on young children, it is not just playing doctor.