As brad sat on the toilet seat, his member swelling before him, he contemplated how it had gotten this bad. The condition had always been not that big of an issue, but when he had hit puberty things changed. His cock started growing more and more massive, and more frequently. Soon enough, it wouldn't stop growing unless he jerked off! His cock head touching the cold tile of the floor was what popped him back into reality. He realized his cock must be over 18 inches by now, and his nuts were sagging down on either side, swelling to the size of soccer balls. He knew he would have to get hard, but he was scared of how big it would get. He closed his eyes and imagined every guy in school who he had a crush on. To his pleasure, his cock began to stiffen, reaching toward the ceiling like a flagpole. He gripped it and began to thrust violently. As he neared the end of his limit, he felt a strange feeling in his nuts. Quickly looking down he was shocked to see they had grown to beach ball size, and were now throbbing. Seeing his newfound balls in this state made him ejaculate, coating the entire stall in thick white spunk. He came and came, and in the back of his mind he knew something was wrong. He had never had this long of an ejaculation before, he looked up and realized his balls were swelling even larger, producing more and more cum. He suddenly wobbled on his seat, trying to grip any part of his genitals to stop the flow. He was silently panicking, he couldn't stop cumming! He suddenly gave a lurch as a massive wave of pleasure flowed through him, he felt his balls and could feel them expanding under him. They touched the floor now, and showed no signs of stopping. He could only wonder how big they could get...