I lived in a really old neighborhood in a house built during the Civil War to hide slaves on their way north along the Underground Railroad. So there was a tunnel with an entrance in my downstairs bedroom that went to the house next door for slaves to escape thru. There was a little room in the middle of the tunnel between the two homes and my best friend Rickey (who lived in the house next door) and I had brought a TV/VCR, a rug, and an old couch down there and we would hang out and watch movies sometimes.
Well, Rickey moved away and I was really pissed 'cause he was a good friend. But the family that moved in after them had a girl named Julie who was exactly 3 months older than me and rockin' hot. We were both 15 when they moved there and so we got to be good friends. Our family had a pool in our backyard so she would come over and swim sometimes.
About a month after I turned 18 we went swimming and she was wearing this absolutely TINY string bikini. She didn't have gigantic breasts, but they were really nice anyway and her legs and butt were totally awesome. I was getting quite an eyeful and lovin' it; she knew it so she was putting on a show by wiggling her rear end and swatting me on the behind and generally showing off her bod.
I was really tall and strong for an 18-year-old but at school I was kinda geeky so I hadn't ever had a girlfriend. In fact I hadn't even tongue-kissed a girl before; this was the horniest I had ever been and I was getting really, really excited. In fact, my cock was stiff and I wanted to jerk it.
Julie left the pool and went home and I watched her through a hole in the fence. Instead of going inside, she walked out onto the porch in the back and took off her bikini to sunbathe. She was quite a ways away so I couldn't really make anything out but just seeing her untie the strings and take her bikini off turned me on like you wouldn't believe. I watched her for a while and then she must have sensed something 'cause she put her swimsuit back on and started walking around the yard.