Sounds like he just needs some personal attention now he has a baby sibling. I'd start diapering him when hes home from school in the afternoon and all weekend. Try giving him special baby attention and in no time he'll out grow it.
I was the EXACT same way at his age.
It’s just a stage some boys experience.
They grow out of it.
What’s more important as a parent?
Don’t yell at him. Don’t make him feel bad. You’ll ruin your relationship with your son and he’ll stop feeling comfortable talking to you about things.
Do you want him to alienate you? Because making him feel bad about this will only lead to him being more secretive. He won’t stop until he’s changed his mind ON HIS OWN WILL.
You can’t force this to happen.
The best thing you can do as a loving parent, is to be supportive and understanding of this phase he’s going through.
You’re better off buying him diapers and setting boundaries and rules with the use of them.
This lets him know that you’re not angry at him, that you love him, that you’re understanding, that you’re empathetic.
He’ll feel more comfortable around you, and your relationship with your son will GROW & Become stronger as a result of you willing to see things through his eyes.
Trust me, making him feel bad about this will only make things much worse for both you and him. He’ll feel he can’t talk to his own parents and this is a downward spiral that will effect so many other things while he’s living under your roof.
But hey, you’re the parent.
What do you want more?
One of these days, you’ll be old and needing his help, and trust me, he’ll remember how you treated him when he wanted diapers. He’ll hold that against you decades and decades later.
I know I don’t trust my own mother. She humiliated me. She talked down to me. She really made me feel like I couldn’t talk to her.
She was a gossiper. I heard her talking about me on the phone to other adults.
After that, I’ve NEVER to this day seen her the same way. I don’t trust my mom with anything , because she’s a gossiper.
Hey, he wants to wear a diaper and use it.
Would you rather him TRUST you as his mother And support him during this regressive “phase”,
Or do you want him to revolt against you, be rebellious against you and his dad, and maybe get into worse things in high school as a result?
What would you rather have?
A boy who likes diapers?
Or a boy experimenting with various drugs in high school?
Your choice!
He’s a kid. Diapers are innocent.
What would you rather have?
Best wishes.
I would do the same but I would never know why
Don't yell at him #1
Be genuinely interested in why he feels like he wants to do this. How does he feel when he does it? Listen
Come up with a solution based on his answer, as long as it is honest
Behavior modify - tell him he is not allowed to do that and if he is seen doing that, that there will be consequences. Be firm!!!