One of my earliest sexual encounters was with a girl of a couple of years older than me. I was a semi-frequent visitor to her house. Luckily for me, her mom didn’t know that her daughter was incredibly promiscuous and willing to pretty much have sex with most any guy with a penis.
At this time (I’d be about 14/15), her actual boyfriend was off in the army, and she wanted a lot more than the neighbourhood afforded her. I was one of the guys who was the apparent beneficiary of those hormones.