Bryan shook his head and removed his hand from his semi-hard cock, knowing he shouldn't give in.
He carefully put his penis back into his pants, although it didn't fit very well anymore.
Bryan backed away from his family and snuck out the front door running to his best friend Mark's house next door.
Seconds after ringing the doorbell Mark answered and Bryan was relieved.
"Thanks god your home." He said giving Mark a hug, and unknowingly passing the infection along.
"What's wrong dude?" The now worried 17 year old replied back.
"Your not going to believe this, everyone else in my family is now a dog, my brother finished changing right in front of me. And then as I went to get out of the house my real dog bit me and I think he is making me change too!"
"Take a deep breath Bryan. Now, how could your family have turned into dogs? You don't look any different, what has changed?"
"I don't know how it happened, I just came home and they were dogs! I uh... changed... down there." He said pointing toward his crotch.
"Come in and sit down, maybe calm down a little bit."
"Ha, you think I'm crazy don't you?" Bryan said as he came inside and closed the door behind him. "Here I will show you."
Mark was shocked as his friend began to work the button undone on his jeans and dropped them to the floor before pulling his boxers down too. He was even more shocked to actually see a dog's sheath and balls on his friend, covered in cream fur. "HOLY SHIT!"
"Fuck its spreading!" Bryan said seeing some cream fur on the front of his legs and almost black fur growing on the backs.
Mark was still staring at the sheath and even moved in closer to touch it.
"HEY!" Bryan said pushing his hand away, "That's my dick in there!"
Mark was finally getting over the shock and thought about what he had done, "Uhh, sorry dude, I just wasn't expecting this. Should I call 911 or something?" he said as he scratched his shirt between his pecs.
"Who knows what they would do to me, and I doubt they would have any way of stopping it.
Mark walked around his friend "Hey you are starting to grow a tail too." he said staring at his friends hairy ass with a 3 inch tail hanging over it. Mesmerized he scratched at his own stomach as his friend reached back and grabbed his tail. For some reason, watching Bryan change was getting him excited, his body was starting to get hot and he kept thinking about the sheath and seeing what was inside.