So! I remember this thing that happened to me… gosh… it's gotta be ten years ago now.
I was lying down in bed, as you do at night. But I got this itch around my belly.  Naturally, I started scratching it and I might’ve gone lower than I usually do.
To my surprise, I felt something happening lower down, slightly lower than I was scratching however.
I thought it felt really weird at the time so I lifted up my blanket to take a look. There was something poking out of my sheath - something kinda small. I think I might've seen it a couple times before, but I can't really remember… (of course I know now that it's my cock)
I didn't really know what to do with it, so I… I tried pushing it back into my sheath carefully. Again, to my surprise, it felt weird to just touch it, and what's more, it didn't move much when it tried pushing it back in… in fact, it started moving out on its own and getting bigger… and harder.
I kinda panicked a little and I did the first thing that came to my mind; I took my pillow and covered my cock with it. …What a bad idea that was! …or so I thought at the time.
That one action of pressing my pillow onto my cock, pretty much squeezing it between my belly and the pillow was enough to make me… umm… s-squeak in pleasure… It felt so good, and I didn't have any idea why at the time.
Absentmindedly, I kinda started rubbing my pillow on my cock, I just lost control of myself for a while, just rubbing myself with my pillow.
The only thing that snapped me out of it was when I felt this one incredibly weird feeling… like super weird, or that's what I thought at the time. It felt like something was building up inside my cock and-- well, I didn't know then. So I left it alone for a while, poking it with my finger every now and again, which also felt good. I liked how it twitched when I poked it. (I still do)
But that feeling of something building up wouldn't leave my mind. I wanted to find out what happened if I kept rubbing past that feeling.
I put my pillow back down, and this time, I started rubbing my cock with my hand. I didn't squeak at all when I used my hand but I could rub faster than with my pillow.
I was once again surprised by that really weird feeling which did make me stop rubbing, but I tried again, this time trying not to stop when the feeling came back.
I had no idea what would've happened after that feeling, so what did happen afterwards was almost scary to me…
A feeling of intense pleasure came over my whole body, my cock started twitching… a lot, I started shaking uncontrollably and I moaned really loudly. I don't know whether it lasted longer than it does now but I know I spent many minutes laying with my hips thrust in the air. Like I said before, it was almost scary, but I still loved the whole thing.

...and that's the story of how I learned about pawing off! Heeheehee~