About 17 I got my first real steady girlfriend, prior to this I had several short lived relationships and an ongoing mutual oral thing with a male friend.
At some point my girlfriend, friend and I had gone to a music concert and had managed to find a reasonably quite corner out of the way for our tents as we were going to be there for the weekend. My girlfriend knew of my friend and I's mutual sucking, as I had been pretty honest with her from the start and she was cool with it.
First day was good, sun was out and the music was good, Lea was wearing a very skimpy outfit (micro skirt and boob tube) and looking smoking hot all day, Billy and I were in shorts and T-shirts. Eventually on the first night we were back at the tents drinking vodka and coke and generally chilling out for the night. Billy was remarking how horny he was, despite his efforts he hadn't pulled any girls during the day and all the skimpy outfits had been turning him on no end.