After Ginger trots in the bedroom, Mark closes his door. "Cal, how does it work?"
Cal sits on the bed, "The collar seems to make you want it, and then the dildo causes the change."
Mark asks, "What if you just use the dildo?"
"I don't know" answers Cal. "Let's try it and see."
Both Mark and Cal remove their clothes, each one staring at the other's male package, and sit on the carpet floor. Cal takes the dildo, and just as he leans over, Mark says, "Wait, I want to try first."
Cal says, "Ok, bend over."
Mark gets on his hands and knees, poking his ass high in the air toward Cal. Cal slowly slides the dildo back and forth into Mark's ass.
"Faster" Mark cries.
Cal speeds the thrusting of the dildo in Mark's ass. Cal notices Mark's balls look different, and watch as Mark's human cock and balls become those of a rottweiler. Soon, Mark's body tenses and he releases his seed onto the carpet below him.
Mark breaths heavily, "I'm still human. It must only work with the collar."
Cal says nothing, only smiling as he slows the thrusting of the dildo into Mark's ass.
Mark says, "Ok, I'm done. Time to clean up."
Cal removes the dildo from Mark, and smiles.
Mark stands up and looks down between his legs, "Shit! It's huge." Mark sits down and slowly strokes his huge pink dog cock. "I think I will keep this for a while. Ginger will love me."
Cal goes over and gets a box of Kleenex and tosses them to Mark, "Clean up your first spooge mess before making another one." As Mark stops playing with himself, he leans forward, and begins to lick his spooge off the carpet. Ginger comes over and joins in. Soon Cal adds his services in licking the carpet clean.
"Ok, this thing has made me bisexual." states Cal
Mark nods in agreement, "Me too Cal."
Cal thinks, "I wonder what happens if I take off the collar with the dildo inside me?" Cal puts on the collar, and the animal lusts begin to surge. Cal looks to his friend, "Mark, remove the collar from me, but keep the dildo inside." Cal leans over, and slides the dildo into his ass. As he begins to pump, his canine changes begin. Soon, Mark kneels down to finish pumping the dildo into Cal's canine form. Once Cal is fully canine, Mark removes the collar with the dildo deep inside Cal. Cal's body remains canine. Mark begins to pump the dildo again, and is rewarded when Cal's German Shepard body erupts in orgasm.
Mark smiles, "Don't worry Cal, we will help you clean up that tasty mess." Cal only whimpers and nods his head up and down. Mark says, "Ok, I am going to pull the dildo out now." Cal feels the dildo slide from his ass, watching his paws intently. After a few moments Mark cheers, "Your still a dog dude."
Suddenly, Mark thinks aloud, "Whoa...how do we get you back to being human?" Cal now thinks the same thing. Mark says, "Let's reverse the process." as Mark slides the dildo back into Cal's ass and then puts the collar around Cal's neck. Then, Mark pulls the cock out of Cal's ass and after a few moments, Cal's canine form begins to fade, as his human form returns.
"Dude, that was scary. I wasn't sure if I'd be human again." says a heavily breathing Cal. "And I was ok with that."
Mark grins, "I would have taken care of you." and Mark points down between his legs.
Cal shakes his head, "I bet. Me and Ginger both."
Cal then gets an idea, "Mark, let me show you something..."