You can try wetting your pants and pooping your pants on purpose.
Then eventually your parents might make you wear diapers.
If you were my kid I would give you a diaper punishment and treat you like the boy in the below picture.
More photos of this diaper boy who got a diaper punishment from his parents and was forced to wear diapers and be treated as a toddler.
https://www.imgvek.com/album/79f889529f8895c1d29763f79c67b0d9/Diaper_Boy_Tommy
I would make you wear just the diaper, shirt and socks and make you use a pacifier, drink from a bottle use a highchair etc.
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