I'm a bit of a D&D fan myself. So that's always a possibility with the right hook.
I tend to be more 'On the Fly' but certainly don't mind something more structured.
Sounds like you have plenty of creative ideas. But let see...
I suppose it would also depend if it's involving diapers who's on the receiving end? Heh.
Yours seem very creative. Mine seem currently mundane at the very best.
I need to collect my thoughts and put out some ideas. But I like quirky stuff.
Discovering an AB/DL Club or Store by accident and curiosity draws someone in.
Or something like a reverse Big (The Movie) situation with someone feeling mid-life crisis.
Or getting an invite to a Daycare for some reason and discovering it caters to adults.
A scenario with product testing and perhaps meeting the chief tester who's "Not Just A Client" as they say.
Plenty of avenues for scenes like visiting a swapped alternate reality or so on.