I only ever told one woman who was a family friend of my late wife's, she told me she had always suspected something and was not shocked when I told her I am still in nappies.
She was more curious than anything and asked me if I would take down my pants and show her, which I eventually did.
Her comment was along the lines of she would like to know how it felt to change my nappy sometime. I told her this was her choice and that I looked like a baby down below, just bigger.
She placed her hand over my plastic pants and felt the bulge of my wet nappy and commented that I was wet and needed changing, however I think the embarrassment on her part, she never did attempt to change my nappy.
I have never seen her since.