I think his brain injury contributes to his unrestrained child/woman groping and sexual disinhibition.
*******
Imo, its that for his entire adult life his depravity has been pandered to and all repercussions kept at bay due to his political usefulness.
He just no longer has the capability to pretend not to be a depraved degenerate and has become so conditioned as to assume that he’s normal.