I think that I started wanting to regress when I was about 16.
I had been a regular bed wetter until I was 10, and had to be diapered every night. These were before the days of pull ups or goodnights, and usually involved a cloth diaper. Occasionally if we were away for the night I would wear a disposable, which i did prefer. Funnily enough I actually hated wearing diapers back then. Strange how things work out.
While I stopped wetting the bed regularly around age 10, I did continue to have occasional night time accidents, although fewer and fewer, until my mid teens. I never got sick of wetting my pants, and used to do it whenever I got the chance, but those chances were rare. But while I liked peeing my pants, I hated the bed wetting. My brother, who was 2 years younger than me, hadn't wet the bed since he was 8, and my ego always took a beating whenever I had an accident.
One night when I was 16, I had a small accident. Thankfully I woke up just as I started to pee, and managed to limit the damage and run to the bathroom, but I wasn't entirely dry. I returned to my room and inspected the damage. I had been laying on my stomach, and my pyjamas were all wet around the front, and I had a wet patch the size of a dinner plate on my light blue sheet. I wasn't going to strip the bed down in the middle of the night, so I got a couple of towels to cover the wet patch, and changed into dry pyjamas.
The worst part was I hadn't had any night time issues for probably a year or so, and I really thought that it was over for good, and now out of the blue it had happened again. I was 16 for Gods sake! These things just don't happen! And there would be no hiding it. I'd have to tell my mum in the morning. Thankfully I still had a mattress protector on, so I hadn't damaged anymore than the sheet.
Now at this stage I was having a rough time at school. That may have even been a contributing factor. But I was being bullied a lot, and was just hating life in general. Everything just seemed so difficult, and now this.
I got into bed but couldn't sleep. I started day dreaming about how I missed the easier life that I had experienced in my younger childhood. I remembered the many times that I had wet my night time nappy before, and how much easier it was back then. My parents never punished or made fun of me, and apart from some light teasing from my brother, no one knew nor cared. I was thinking about how much I was hating school, when I never used to at primary school.
As I lay there, I started to mentally drift back in time to when I was about 10. Back then school was fun, I had more friends, and if I did wet the bed it was ok, because I had a nappy on. The only downside that I recalled was the embarrassment of having my mum or dad diaper me before bed, or my brother teasing me a bit.
I think that's when I started to regress, when I was 16 and yearning for simpler times.