When I was younger I lied a lot about my dick size and had mixed feelings of jealousy and admiration for better hung guys.
I had a gay friend the same age as me, whom I was jealous of. He was more successful than me in life (work, friends, love), he was more good-looking, and of course he had a bigger cock, about 19cm, even if he was not at all cocky about it. I was a bit taller than him but I didn't see that as an advantage.
So, to save face, I lied about many things, including dick size.
In fact, I lied so much about the size of my dick that until today I was sure it was 17cm. I hadn't measured it since I was 20, and it happens to be closer to 15cm. But when I learned the 'news' today, I didn't make a big deal out of it. I waited until I was 31 to know the real size.
I don't know what changed but I lost the feeling of jealousy to keep only that of admiration for men better built than me. As a gay man, it seems easier.