I wear Goodnites XL to bed. I love to fantasize about being a little boy (sometimes toddler, sometimes elementary/middle-school age) who was never potty trained, or got put back into diapers after potty training. It makes me feel childish, innocent, safe, relaxed, happy, comfortable. I can pee and poop myself and it's okay, it makes my fantasies more tangible to feel it. I was diagnosed with Aspergers syndrome, so I'm on the autism spectrum and I just love it.
But it's only something I do in the privacy of my room. It's a personal, private thing for me, excepting other people (like you folk on this forum) who participate and understand/don't judge. I'll wear one for the first time outside my house for my first ABDL meet-up/Munch, but COVID has delayed the prospect of doing that for a while.