The summer I turned 13 I had a sleepover at my friend's house. He was close to the same age as me, a few months older. It was a hot night, and we slept in just our underwear. We talked about girls at school we thought were hot, and things of that sort. He asked me, 'You know how older guys talk about how a girls pussy smells good?' I said yes, and he said 'Want to find out?'
Of course I was interested. We went into the next room (his sister, who was 17 at the time, and not home), and he took some panties from under the bed. He gave me a pair and started sniffing the crotch of the pair he had. I did the same, and wow! I loved the scent, I was instantly hard, as I could see he was. 'Do you ever jack off?' he asked. I didnt want to admit it, but did after some prodding. 'Let's do it now,' he said and dropped his shorts and started jacking. After a seconds hesitation I did too. I'd never seen another hard penis, and here I was with my best friend sniffing his sisters panties and watching him jack, with him watching me. I began to stroke with the panties so I copied him. Soon he was grunting and when he came I saw sperm for the first time. Within seconds I came too. This was different from my usual dry cums, and I was left sweaty and shaky, looking at his sisters panties covered with my cum. My first wet cum! We threw the panties in the hamper and went back to his room.
There's more to the story, but I'll save that for another time (including what happened when his sister eventually caught us with her panties).