It's normal for a 14 year old to wear diapers.
While most 14 year olds are potty trained of course, some 14 year olds may need to wear diapers either at night for bed wetting or they may also have incontinence and need to wear diapers all the time including in the daytime.
And some 14 year olds may also love to wear diapers, which is also normal.
All kids of any age can wear diapers and should whether they like to wear them or if they need to wear them.
Here's a boy of around age 8 that wore pampers plastic backed diapers all the time and he looks so cute in them.
You can see more pictures of Diaper Boy Tommy in his pampers at the below link.
The pictures were taken sometime in the 1990s.
https://answerpail.com/index.php/225924/some-pictures-of-diaper-boy-tommy-in-his-pampers?
