First time I saw a pair of boobs (M)

It may not be a particularly transgressive story, but at least this is true. I won't specify my age so as not to make reddit sensitive, but let's just say that hormones were running high. I was at the beach with my family and my cousin's (we're the same age). We went out on our lilo to go for a swim, and while walking along the shore, we spotted a seemingly topless girl in a slightly more secluded spot on the beach. Obviously, my cousin and I decided to get as close as possible to confirm: indeed (I still remember it quite well), it was a girl of about 20-30, blonde with short hair that reached just above her shoulders, fair skin, wearing a straw hat and sunglasses, and who was indeed sunbathing topless. I had never seen a pair of breasts in real life, much less a topless girl (in Italy, where I live, it's not that common). For our first time, I have to say that my cousin and I were lucky: not only was the girl really pretty, but she also had a great pair of tits, about a D cup, soft and curvy, with large, pink areolas. I don't know how long my cousin and I stood in the water staring at her, making comments among ourselves (at least ten minutes), and we only left when it was all too obvious, even to the girl, that we were there just to stare at those big tits. Once we returned to our spot under the umbrella, we overheard our parents also commenting on the topless girl, and perhaps because they thought we were too young to be interested in the subject, they enjoyed commenting on how big the girl had big tits, while I had to do everything to hide a massive erection in my swimsuit.