Yes is the awnser to your question you can retain your body to do anything it just takes time that's why they train you in rehab after an accident for instance after being in a car wreck.
As to your question regarding un-potty training yes this is also possible should you want to do this, I should know as I am busy trying to untrain myself at this time you see in my case I was diagnosed with a weak bladder so I am.already part there without trying.
If you want to have a natural surgery free way of becoming diaper dependant here's how to accomplish this goal the steps bellow outline a method of becoming a baby/toddler again with out the need for risks.
How to become a baby/toddler:
1. Start by buying yourself some decent quality adult disposable diapers in your size the more absorbent the better look for those marked overnights or maxi or in some cases ultra, don't forget to set yourself realistic goals and take I step by step as it won't happen overnight it may take weeks or in some cases months to years to fully achive.
2. Start wearing those newly aquirred diapers every day for a week without fail every time without letting yourself use the toilets from now on your going to be totally Indipendant of yucky dirty and often times unhyginic public toilets.
3. Try relaxing in your new diapers as this will was the pressure you are feeling pycalogically now get some rest babies need 8-20 hours of sleep including naps although don't consider that your a baby unless you want to do so as this is negitive thinking lots of people like myself have to wear diapers for health reasons, so the thing is not to think about it.
4. Drink plenty of fluids this won't work if your dehydrated drink up to 8 pints of fluid preferably not alcohol if you can avoid it all together as alcohol is not good as it causes drunkenness and you don't want to be drunk and as specially given alcohol does damage to the body and mind if consumed in too much quantity.
5. Don't worry about how many diapers your going to use you'll be getting through alot should you get to this stage as babies aren't continuant usually the average baby/toddler goes through 6-8 diapers in a day this is what you'll be relearning so it's bed to stock up well in advance before trying this approach on items such as diaper cream, diapers, baby lotion and oil, baby wipes, baby powder a large padded changing mat if possible a passifier or two and other items such as baby bottles milk formula if possible go for the pre-made baby milk it comes in bottles of sma or cow&gate your going to need quite a lot if you are using I as a fluid replacement.
6. If at anytime you want to go out in public remember to wear bulky/concealable clothing as in to hide the fact that your wearing diapers for the first time since you were a baby/toddler, if you get caught out don't panic just say to them your wearing diapers because of a medical condition or disability but don't make it obvious that you are wearing them on purpose.
7. Important note of caution: If at anytime you feel uncomfortable or unsure with this process or wever or not it's right for you then stop immediately before it becomes permanent although please note it may take a couple of weeks for your body to re-adapt back to normality.
8. However if you are committed to continuing this process then by now it will become your new way of life or should I say more accurately old way as your re learning stuff that you were trained not to do anymore once you reached 3-4 years old and in some cases earlier or later on.
9. If you choose to follow my tips on becoming a adult baby or diaper lover and become fully dependant on these items then please don't forget to set up your new place as a nursary of sorts with plenty of soft toys and a adult sized cribb/cott if possible.
Note:
Well that's all for now except to wish you good luck in successfully returning to being diapered
I am following this because of the fact I am disabled and will be going into care next year so am choosing to continue what my body requires of it's self and what I know that I can realistically achive given time.