I was REALLY tiny at the time, especially on soft, and my balls stayed tightly packed together, so my little wiener just laid on top of that. I was at that stage where you're just starting to become curious about where you fit in, I figured I was probably on the same level as the rest of the guys I knew.
Then, a friend's older brother by a couple, who was small and skinny like me, came in the room from the shower one day in just his yellow smiley face Joe Boxer, loose fitting cotton shorts, and he did a little hip thrusting just to show off, and it was like this big snake flopping around between his thighs.
My jaw about hit the floor, and I felt like I had been punched in the gut. I didn't know it was a possibility or expectation for one of us to be THAT big. My dick didn't even hang, much less flop around like that.
That was the start of my big obsession with size and complex with feeling small and embarrassed and anxious for anybody to see it. I started wearing boxers because I was self conscious about having no bulge in briefs, and I would try to wobble my dick in my boxers in front of the mirror. Nothing. It was too small and my little balls were too compact. I couldn't even touch my thigh with the head. I would think about what he was packing often, wondering if it was really all that big, or had he faked us out by putting something down there.
Well, he was an exhibitionist, he was hung and he knew it. So, he started pulling it out and showing it off, even getting it hard, and it absolutely dwarfed mine, the difference was astronomical, like a professional athlete to a pee wee league kid.
I would also get really turned on seeing him show it off to girls, either by pulling it out, or grabbing it against his leg to show the imprint, and seeing the reaction in their faces, a mix of being fascinated, impressed, and turned on. They talked me into revealing mine in front of this older hot girl once, and it just got a slight giggle and sympathetic "Aww that's okay."