My older sister was my first
When I was in my mid teens, my older sister who was 18 or 19 told me that Mom wanted her to explain to me about sex. I knew that it was a lie. My family was way religious and there is no way my mom said that. But I wanted to roll with it any way.
She came to my room in the basement that night. My parents room was upstairs. I don't remember how it all started, but I do remember her showing me how to play with her boobs. She said not to, "Sweaty palm them" and showed me how to play with her nipples. I don't remember if I sucked them.
I should add that my sister had a great figure, and all the guys in the neighborhood gave her lots of attention. I suppose that she was good looking from all the attention that she received.
I don't remember what else happened or how it transpired, but I do remember that my dick was in her and I was on top. It was my first time playing with boobs and sex. I remember her asking if I came yet. And when I said no, she said good and had me stop. It was just a one time thing.
The only other thing that happened with her was me in her room one night and her saying that her pussy was ugly, I said that they aren't. She opened her legs and showed me up close with the light on. She said look at all these colors, it's ugly. I told her that it looked good to me. I should have recognized that as an invitation, but I was brought up way religious and was afraid of going to hell for sex, so I just left her room awkward like.
With my adult mind, and minus the religious programing now, I now know I could have had all kinds of sex with her. I'm sure that I could have had blow jobs, fucked, perhaps 69'd. But I never made a move because I didn't want to go to hell. But in retrospect now, my teen years would have been much more fun if I didn't worry about going to hell and just had lots of sex with my sister.