Puberty was definitely a bit weird for me... I was a bit of a late developer in everything except dicksize. At age 13 I was about 5'2" tall and maybe 100 lbs, but my dick was probably pretty much the size it is now - and I was still totally hairless. As a matter of fact, at that time I was more embarrassed about not having pubic hair than I was about dicksize (I didn't get pubic hair until 14). If I remember correctly, lack of pubic hair was a more common tease thing than dicksize at that age.
And I do remember one day when I was around 12 and we were in a friend's garage (it was raining out) where a few of us neighborhood boys showed our boners - and although I was one of the youngest and shortest in height, my boner matched or beat even the two tallest and oldest boys who were probably 14 then. That's when it really hit me that I was big. Previously, I kinda knew I had 'a big one' since a few of my childhood friends had said this at various times, but it didn't soak in until this time.
Without a doubt, getting a boner at an inopportune moment was horribly embarrassing back then. Sitting in class was a common place for me - but the end of a boring class, my cock would often be rock hard. Sitting on a bus (bouncing around - or the vibrations, either way) was also notorious for making me hard. And once hard, it would stay that way for quite a while no matter what. On a skinny kid 5'2" tall, a thick 8 inches tends to 'stand out'...
One of the most embarrassing was having to buy a suit for a family wedding when I was 13. Mother took me to our family tailor and he measured me and had me do fittings with his assistant assisting... and all those measurements of my 'inseam' had me getting hard. The tailor and his assistant (an asian woman) made some jokes about how I was making their job so difficult - and how the front of my pants wouldn't hang right - "with that thing in the way" - my mother of course would be reading a magazine or something and ignoring it all.
Now that I'm think about it, the memories are flooding back... all those embarrassing moments. And to think that at the age of 13.5 I would have traded a few inches for a few pubic hairs! Ah, the intensity of one's emotions at that age...