The growing heat in his loins was accompanied by other changes and Dan watched both scared and aroused as his cock began to slowly swell and surge longer and wider. From his starting average length it grew, surpassing six inches, then seven, eight. As it lengthened, Dan watched as his cock grew thicker, much thicker, and his balls began to grow to match his cock. "God, he thought, how is this possible? What was in that bottle?" Still though, he was far too aroused by his growing and thickening cock to care much. The heat in his loins continued to grow as his cock and balls did and Dan could not resist any longer. He reached down and grabbed his tool, no longer able to reach all the way around it with one hand, and began pumping it up and down. Precum began bubbling up from the tip of his cock and he watched as his cock surpassed ten inches long, balls bloated to the size of baseballs. As his arousal continued to mount, Dan felt another surge of growth. His cock was now twelve inches long and as thick as a coke can. Dan felt the pressure welling up from his huge nuts as he continued to pump his shaft, now totally lost in the heat and sensation of his growth. When he could not take it any longer, Dan closed his eyes and let go. His huge cock blew an immense load all over the opposite wall, splattering it with white for a foot around. Dan breathed a huge sigh of contentment and whipped the sweat from his forehead. "That felt incredible", he thought to himself as the heat dissipated. Opening his eyes, he was greeted with the sight of his rapidly softening cock. Looking at it, he estimated it had grown a little longer, up to an almost unheard of thirteen inches long and three inches thick. His balls were similarly large, and still seemed ready to let loose another batch of cum. Dan looked from his cock to the bottle. "Now what am I going to do with this monster" he puzzled. It would be awkward having a member this large yet Dan could not get it out of his mind how awesome it had felt to jack himself off while he grew. He imagined having sex with his huge tool, impressing all the girls and shaming the other boys with his newfound size and girth. He felt newly confident that any girl he asked would be all over him and his big cock. He guessed with the amount of cum on his wall, his loads were huge now too and he could almost feel his balls refilling after his session a few minutes ago. Deciding that he could have some more fun later, Dan decided to see if his clothes still fit his lower half. Putting on his boxers, Dan smugly thought looked like he had stuffed some wool socks in his underwear, his bulge was that large. He guessed he was about six inches soft and still quite thick. He put on his pants and while the size of his member was still visible beneath the fabric, the pants covered it enough so that it wasn't uncomfortable. Dan realized that his pants were still pretty snug though and that getting hard in these would not be a good idea. After cleaning up the bathroom and spraying some aerosol around to mask the smell, Dan went back to his room, closed the door. "Screw my homework", he thought, instead decided to inspect the Salve of Transformation bottle more closely. Other than the name, there was not information, just the words in very small print, "Caution advised". "Thats helpful" Dan said to himself. Finding nothing else interesting on the bottle, Dan undressed, got in bed and wondered what to do next.