Andy crawled out of the car and stumbled toward the gas stations doors holding his crotch. His zipper was far beyond about to give, his bladder was being crushed by his tight underwear and he could feel his clothes digging into his skin. He let go of his crotch for a moment and uncomfortably waddled into the the gas station, his bulge sticking out very noticeably, to his dismay saw no toilet. He asked the gas station attendant. “Where is the toilet?”
The gas station attendant was a bony looking fellow in his early twenties with a company cap. “Ah, it's out back.” He rustled around under the desk with his hand. “Here is the key, give it back when you're done.” Andy thanked the attendant and turned around with the key in hand, just as his zipper finally gave, the metal clicking to the floor. “What was that?” The gas station attendant wondered out loud.
“Sorry, that was me, it was nothing.” Andy looked down and saw his bulging underwear poking out between the zippers, already threatening to slip out.
He reached the toilet and opened it, rushing in and slamming the door behind him. It was a simple but surprisingly clean toilet cabin that reeked of bleach with ax with a single toilet, a single urinal and a washing bin. His trousers were so tight that he couldn't get his dick out, it took quite a painstaking effort to unbutton but then he finally just ripped his clothes, his cock flopping out.. Andy didn't have time to marvel at his flaccid manhood. The urinal was so high and his manhood so long that he had to lift his dick quite high to piss into it. A powerful stream flowed out of his manhood and he sighed in relief. When finally relieved, he looked down at his dick and couldn't believe his sight. Even flaccid it was now about 21 inches long, and it looked significantly nicer than his former flaccid length, heck it looked way nicer than his old erection. Even his new one. It kept dripping so he shook it a bit from side to side. He started getting horny. He looked at the door, it was fully sealed, and nobody could look into the toilet from the outside and the door was locked.
Realizing that they had been the only car to have pulled over here, he decided to jerk off. Jesse couldn't stop him and he could say he had to take a shit as well anyway. He started rubbing his long shaft and wiggling it around some more. He felt it took a quite a big amount of time in to get hard with this monster but his comprehension of time quickly started to fade. 21 inches, 23 inches... 25 inches... 27 inches. He lustfully looked at his intimidating manhood. It looked so amazing, it's proportions far superior to Jesse's old manhood. He kept stroking it, and stroking it, and stroking it. His breathing becoming quicker and his shaft feeling hard in his hands.
Suddenly Andy realized that there was someone pounding on the door. “What are you fucking doing in there!? It's been HALF A FUCKING HOUR.” Jesse screamed from the other side. Andy didn't even hear him the first time he called.
Andy while still pleasuring himself answered but accidentally with an unmistakably horny tone. "N-nothing!"
“What the fuck? Get out of there! You better not be doing what I think you are doing!” Jesse yelled. Jesse then yelped as his crotch stung again. Andy's crotch now uncovered felt warm, and Andy saw and felt his shaft lengthen and moaned from the experience and started to rub his growing shaft as fast as he could despite already being fatigued and just as his manhood reached 35 inches long. He came, a thick squirt of semen shooting into the urinal and then again... and then again... On the other side of the door he could hear Jesse groan. Presumably with his hands on his own 1 inch less manhood.