Hmm i agree but I'll have to think a lot about the earliest moment of realization, good topic.
I used to be a really sensitive , really shy and really scared kind of a kid, I never spoke much and I couldn't, even if i tried to, the voice just wouldnt come out of my throat

: So when I was about 5 yrs old, we used to go to school in this mountainous area, where our school was far far away, and we used to go in the huge army trucks( they were the mode of transport for kids in that area) and kids used to fight to sit on the front two seats since the back of the truck used to freeze our bones in the callous winters with the cold wind as it wasnt covered on all sides. Me and my sisters used to go to school on that truck.
One day, I considered myself lucky to get into the front seat and was as happy as a kid

Untill the driver seated me and closed the truck door, my hand was in the door and he banged the heavy metal onto it, with the result my thumb getting stuck in the door way , with me gasping to control the last bit of patience in me to control my screams, cuz, well i was THAT shy

: I did utter a small cry but he was outside the truck that time trying to go back to his seat from the other side.
Now, I was so scared to speak that for the next 1 hr, tears kept rolling down my cheeks and I did not have the courage to tell him to open the door and my hand was stuck there :exhausted ( I dont understand how I managed being such a fool


For the next hour till the drive to the school, I kept my sobs under my breath, which was easy considering the truck engine used to make a lot of noise so nobody could hear me. My siblings sat at the back of the truck so I could not tell them.
Well it was an hour's drive to the school, and after half an hour i think my hand got numb and the feeling of pain subsided a bit and it made me think that hey its going to be ok, school will come in a while and I'll be out, but better not tell the driver uncle cuz he will scold me :/
And when the school came and he came to open to door,as soon as he opened he saw me take my thumb out of the door and he was like 'hey why didnt you tell me all this while! you should've told me'. Now when the blood started flowing back to the thumb area, it was excruciating! The driver probably thought that it didnt hurt much thats why I didnt tell him, but I was petrified and he said oh its just a lil blue, it'll be ok. It wasnt blue, my whole nail was all dark purple with the blood coagulated there and the pain, ufffffhhhh i cant still feel it...( not really, but as I recall).
That day I learnt that I had to speak for myself or I'll suffer continuously in my life for not having the courage to speak, ever. Though I didn't start speaking so much untill after that, but alhamdulilah I was able to speak about what I wanted to have or if there was a dire need. And now, well everybody begs me to stop talking
