Matt took a good look at his gun penis, it was essentially a 5inch long quarter inch wide metal pipe still warm from shooting. It was connected to his body which otherwise looked normal. Curiously he touched it. Though he could feel his fingers on the metal rod, even rubbing it didn't excite him. Then after a bit of thinking around, he was able to mentally access his gun control. As he set a target, his hornyness came back, and blissfully he could take a shot at the ceiling.
"Hey," shouted Jacob from inside, "no fun unless I say so", and quickly turned Matt's penis back to flesh. Matt pouted and his mind wandered over the many options his avionic mind gave to him. Suddenly he grinned and said, "Looks like I'm gonna have some fun with you, too.", as he started a process.
Suddenly Jacob felt a strange sensation, his already rubber body started to deform. His scrotum stretched into a wheel shape and changed from his previous purple to black. Meanwhile his arms started to straighten and his legs started to bend. At the same time his surroundings started to change, too. It lots its definition and turned into a dark room. Pipes and cables formed in a tight space surrounding his changing body. Between his hands another wheel started to form, connecting both hands with his arms getting shorter. His face distorted into a grotesque form as his mouth fused and his eyes turned into a front light. His forehead extended above his hair and became a transparent windscreen. The back of his head formed the controls of a motorcycle. His ears were turning into the handlebars. On his back a seat grew. Instead of the pilots seat he was previously sitting on, he was now held by a soft grip which suspended him in a dark room. "You know", radioed Matt to Jacob, "It seems like I come with a little accessory, a companion motorcycle".
"And now it's time to take a look at you", he said as he selected the eject option for Jacob. Suddenly he spasmed forward as his muscles were pushing out Jacob through his ass-slit which momentarily grew in size for this feat. Within very few seconds, Jacob grew from about 17 inches in size to a fully blown motorcycle... before he tipped over. "Ouu", Jacob cried out, "can't you at least set me right up". Matt complied and put down his friends kickstand before straddling him. He turned on Jacob's engine, but left the clutch open, revving it up a few times, enjoying the roar of the motorcycle engine.