This is probably NOT an answer but when I was growing up, I knew 2 brothers that loved each other very much. It seemed that they would always find a reason to get naked, now being 15 & 16 at the time, all us other boys had no problem getting naked. They were BOTH very gifted in the cock & balls department & being young, it seemed that they were also getting a nice patch of pubes. The 3 of us sucked each other many times. I wonder if they STILL enjoy each other? You & I may never know?
Don’t. Fantasizing about sex with 15 year old boys is gross and creepy.