I first masturbated under my diapers when I was around 12. My mother diapered me every night because I wet my bed and couldn't stop. She used cloth baby diapers and rubber pants in those days. I started to become aroused while I was being diapered. I felt different than I had before, and more out of curiosity than anything else, would touch myself, my pee-pee , and my mom would push my hand away, tell me to be a good boy and finished pinning my diapers on. But instead of feeling ready to nod off, my pee-pee would still feel funny and if anything was even harder than before. So naturally, I put my hand under my diapers, hold my pee-pee and began to move my hand up and down my shaft until eventually I felt something more intense at the tip of my pee-pee than I ever felt before. At the same time, wet, sticky stuff came out the tip, almost like I was going potty, but much more intense. And then the next morning I woke up as usual in soggy diapers and rubber pants, but now my pee-pee was hard too. So I did what I had done the night before and again I experience such intense feelings, I shivered all over and the same sticky stuff came out. Then mom came into my room like she always does to unpin my diapers, clean and dress me for school. But this time, after unpinning my diapers, she noticed my cummy all over my pee-pee, started laughing, and asked me if I had just played with my pee-pee. Suddenly I felt quite embarrassed, certain I had done something naughty. But she reassured me I was just doing what every boy does, hugged and kissed me, wiped my pee-pee and bottom, and dressed me for school. Since then I have masturbated probably every night under my diapers until I stopped wetting my bed and wearing diapers. But over the years, whenever I secretly pinned diapers on, I always ended up both wetting my diapers, sometimes messed in them, and finished up by playing with myself under my diapers. Now, since I have been wearing fulltime and my wife accepts this part of me, I try to wait until my wife changes me hoping she will play with me during at some point and she usually does. But like always if she doesn't, my hand will finds its way under my diapers and touch and play with my pee-pee. I don't always go all the way since I like to have my pee-pee in my hand so much I don't always cum.