Apart from elderly or disabled people, I only had one sighting in my life…but a very interesting one !
Be me, waiting for my smoothie at the counter of a juice bar. Suddenly, my eyes are attracted by the strange shape of the waitress'bum (a cute and skinny student, approx. 20yo) : strangely puffy, no butt crack and a very small wet patch where a diaper would usually leak ! Plus she kept passing her hand in that arena, discretely but visibly nervous.
My doubts were confirmed a few minutes later : raising her hand to ranch something too high for her, her shirt rode un and I sw THAT waistband. She lowered her shirt hastily ans asked her colleague of she could take a break. I felt bad for her because she looked very nervous, but it was so hot !
My theory is that she wasn't fully incontinent, but accident-prone because of an overactive bladder…and diapers were probably the best way for her to manage it during her shifts