Revently on Quora.com, I came across this question by another user/person and it peaked my interest here's my reply
Yes, absolutely as there's nothing wrong with wearing them. Anyone, at any age, can wear diapers/nappies for any reason.
I, myself, am nearly 40 and have partial incontence although not because I choose it, so I have to occasionally wear them from time to time.
Let's face it as we get older our bodies change and if you've got a underlining medical condition and/or disability, then yes you may very well need them.
My advice is go with what feels right to you. And know this, just because you are wearing them doesn't make you less of a man or a human or that your a baby or infant for wearing something that is perceived as wrong.
Don't listen to those who would say that anyone past the age of 2 should not be wearing diapers/nappies as they are immiture themselves and don't understand the whole reasons you may or may not have choosen to wear them.
In my case I wear them because of my medical and psycological reasons but also for comfort. I think every one of us is an individual and he or she can make up their own minds. Yes I am wearing my diapers right now whilst writing this as I have to wear them for the purpose of preventing bed wetting accidents
And yes at some points in my life I do feel like an over-sized toddler but that comes with my choice to regress to that part of my life although I will go over more about that on another days reply.
Yours sincerely
Chinababy888.