Seriously, where did you get that point of information from?
He wrote about it in his own book, Dirty Daddy.
I guess it was a four foot doll so not infant doll but young child doll he would “play with”. Problem is, as a prop on that show, it represented one of the Olsen twins whether he was of that mind or not or at least represented a young child. Immature or perv? Only he and God know I suppose. Being hollywood ...