I from a background in child development and counseling would say that what a child acts out is what they have had exposure to. If a child came up with the idea of getting someone else to put his genitals in their mouth, he saw it somewhere or heard of it somewhere. Someone around them is either doing it to them, talking about it to them, or watching porn somewhere they can access it. And now he's into "sharing the fun" because he's curious about it. Frankly, I would run like crazy from this situation. If this were my child, you were my child's father, and I was sharing custody with you, and I got the faintest idea this had happened, I would be taking you back to court pronto if you did not most immediately cease and desist all contact with these people, mom and child. If you wouldn't, I would do my darndest to make it happen. Incidentally, I do not believe a child should be labeled a problem child without good cause, but I'd be watching this child, having this child to counseling, trying to figure out where the exposure was coming from.
I'm old, I've seen much, and we had this sort of problem with a much younger than my child little girl in our church children's group. It turned out that yes, one of mom's many "friends" was the one giving her the idea of seeing other children naked, little games behind closed doors, etc. She wasn't a "problem child" to be labeled, she was a child who had a problem, in that her mother was too interested in her social life and not culling bad people out of her life and not watching her closely enough. That did not mean I was going to let my child be exposed to her curiosity.
