When I was about 10 years old and my nephew was 3 years old, we used to 
sit together in this big rocking recliner and watch cartoons every 
morning after breakfast.

It was summer vacation and as usual I spent summers at my sister's 
house in Connecticut.

Every morning it was the same routine. I would finish my breakfast and 
head downstairs to the playroom to watch TV. As usual I was joined a 
few minutes later by my nephew Dave. But not before Davey made a little 
pit stop.

He was so predictable. He would come down the stairs, waddle over to 
the ping-pong table, then go behind it. I would watch as he bent his 
knees slightly, squat a little and start grunting and pushing. His face 
would get really red as he grunted. He never had to push very hard. 
Within seconds I could hear the poopy push its way into his diapers and 
plastic pants. After he finished pooping, he would stand there for an 
extra couple of seconds and finish peeing in his diapers.

Typically Davey's night diapers consisted of 2 disposable diapers and 2 
cloth diapers and then plastic pants.

He never saw me watch and I always pretended I didn't know what he was 
doing. I would stand there watching him do the "big job" the whole time 
rubbing and squeezing my hard cock. I would go back to the recliner and 
wait for Davey to join me. By this time the room was filled with the 
stench of Davey's dirty diapers. It was a combination of peepee, poopy 
and baby powder, but the smell always aroused me and made me horny.

Davey waddled over to the chair as predicted and got up into the chair 
and sat in between my legs. I would let him settle in. After about a 
minute or so I would reach between his legs so I could feel his bulky 
diapers. I could feel the warm pee through his plastic pants. I would 
then reach deep into his crotch and start pushing his poop in between 
his legs. I would pinch and squeeze. I could feel the mushy poop in his 
diapers. It felt like hard mashed potatoes. I would rub and squeeze his 
poop all over his little erect cock. I could feel the poop getting 
slick over the shaft of his penis. The whole time Davey would just sit 
there and let me do this. His face would be all red and he actually 
enjoyed having his diapers squished. If I would stop, he would push my 
hand down into the crotch of his diapers. Sometimes Davey would stand 
up in front of me and ask me to squeeze his butt. I would squish and 
squeeze whatever poop was left over in the back of his diapers all over 
his butt cheeks. By this time Davey's entire diaper area would be 
covered in poop.

Then Davey would get back in the chair and sit in between my legs while 
I rubbed his erection and squished and squeezed his diapers. Then I 
would rub myself and masturbate until I had an orgasm. I remember how 
stinky the room became.

He would spend about an hour or so in his wet, stinky diapers until my 
sister changed him.