I'm a newfag to this forum, and I'm happy to discover other ABDLs who love to get stoned and diapered.
23 / M / Georgia, USA… It's illegal here. I am moving to Massachusetts next month, though, and they just voted to legalize, so I'm pumped about that. Sadly, I'm neither padded nor stoned at the moment…
I think I most like this combination because of the tactile sensations it enhances. It makes me feel very sensitive as I pee, the warmth and swelling of my diaper feel so cozy and yet erotic, and of course orgasms while stoned are fantastic.
Since you asked, OP, I'll also talk about my experiences with diapers and a couple other drugs. I'm primarily a DL in most cases (maybe 80/20 DL/AB split), but I have found that LSD really brings a sense of realism to my AB/submissive fantasies that make them some of my most euphoric diapered experiences to date. When I have dropped acid, I have often asked my girlfriend (who is also AB/DL, but that's another story) to diaper me, put me in restraints, and treat me as if I were little for maybe an hour or two, often when I am peaking during the trip. What will often happen, especially if I am on a higher dose of acid or have also smoked weed, is that I will casually wet my diaper and then forget that I did so shortly after the fact. For some reason, not knowing whether I am wet or dry, as well as finding out that I have wet (or better yet, having her point out to me that I wet) is supremely arousing for me. This corroborates how real the acid makes the role feel for me– in that moment, I truly do feel like a little kid who needs to wear diapers.
I am also a big fan of magic mushrooms. Ironically, though they are chemically very similar to LSD, I find any discussion or presence of diapers repulsive when I am under their influence. (Unlike acid, which makes me giddy/silly, shrooms make me feel cerebral, serious, and even wise; I guess they just don't jibe.)