"Why are you doing this to me Duke?" You plead as your cloths start to become baggy, "I took care of you, fed you, played with you, took you into my home, and gave you my trust for crying out loud! How can you even think of turning me into your toy?"
Duke smiled at you, moving closer and nuzzling your shrinking legs, "Sex is just one of the reasons, and you just named the others."
"What?"
"Don't you think I could have used that collar's magic on anyone if I'd wanted too? I just had to think and anyone would have put it on. But I used it on you *because* of what you did for me, not in spite of it." Your knees pop and you fall onto a fours, "And I didn't make you a toy or even just my Bitch, I made you my Mate. I love you, and I know that, even before I changed you, you loved me too."
"N-no, no way."
"Remember how you called out when I mounted you, how you wanted it so bad. That wasn't the spell's work, all it did to your mind was remove your inhibitions, the ones that kept you from acting on feelings that were already there. Otherwise, you would have hated every moment of it, you would have never enjoyed it, even though your body would have gone through with it."
"But...but how?" you ask as fur covers your body, your arms reshaping again to match your hind legs. "I was a guy!"
"So?"
"I was strait!"
"So?"
"So?! Strait human guys don't fall in love with male dogs!"
"Strait, Gay, those are inhibitions, they generate fear that stops love before it starts, when your inhibitions were removed, you were free to act on desires repressed within your mind. You and I love each other, that's all that matters..." he nuzzles you and licks your face, and without thinking you return both, and you realize it was on your own free will, you shake your head trying to clear your thoughts, only to realize that there was no fog of lust in you mind, no force controlling you, "See? there's nothing stopping you from acting on your feelings now."
"But, I don't want to be a dog."
"You won't be one all the time, just when we wan't to make love, or not even then if you like, I wouldn't mind fucking you as a human, and I don't have any reservations about you fucking me. Or we don't have to fuck at all, just talk, that's the main thing I wanted anyway."
As you finish shifting, you shuffle out of your cloths, "Then why'd you force me to the first time?"
"The spell wouldn't have stuck if I hadn't fucked you, it was the only way to bind the magic to us both, I'm sorry if I freaked you out."
You consider for a moment, "What if I don't want this relationship with you?"
Duke's ears drooped, "I'll be sad, but I'll release the magic, and you won't remember anything about this. All I ask is that you think about it for a bit, I'll wait upstairs for your answer." As Duke goes back to your bedroom, you begin to think on what to do...