My family was brought up with the ideal that nudity was different than sex. Me, my sister, and my parents could all be naked around each other and it wasn't sexual, it was just the way we were. We weren't nudists, though, we didn't go to nudist colonies or nude beaches. But when we were at home, we would relax by taking off our clothes.
When my sister and I were little, there was no problem with that. I liked being naked, and so did my family. But when I advanced into the teenage years, I began to feel differently about our mutual nudity. I didn't dislike it by any means, in fact I started to really enjoy it. After I started getting erections, I thought maybe my parents would sit me down and lecture me about the difference between nudity and sex.
But instead, they didn't say anything about it. In fact, whenever I got a hard-on, they seemed to either ignore it or be amused by it. It was confusing, but as long as they didn't mind, I couldn't help it. Especially now that my sister had developed into quite a specimen.
Kathy, or "Kat" as we called her, seemed to turn eighteen overnight. She had always been skinny, which was unusual for girls as short as she was. But after she hit her peak height, the rest of her seemed to start filling out just right. She wasn't what I would call thick by any means, in fact she was very toned and athletic. And her constant nudity had allowed me to appreciate her sculpted curves as well. She had the greatest ass, and fairly generous breasts. In that way, along with her good looks, she took after our mother.
I took after our father, who was good-looking and nicely built too. Even though I was only nine months older than Kat, I think that I had developed faster, which was unusual for boys. But when Kate finally filled out and grew real breasts, she seemed to strut around the house like she wanted to show off to everyone.