Re: PLEASE help me, I'm at my wits end with this!
I don't have any experience with this, I'm sorry! My boys grab at their units when they are being changed, but I've never experienced them pulling their penis out of the diaper.
I'd say maybe start pushing the PLing more. Do you have a potty seat or a seat that sits on the toilet seat? As for books, do you have a library close to you? I wonder if you could find something online and then see if you can find it there. Good Luck!