"What a fine pet I have." Ratchet thought out loud as he gently pet your head, much to your pleasure.
If you could have you would have purred, but you had to settle on humming happily as you nuzzled against his hand like a cat.
"Healthy, but a little too skinny," He thought by himself. You were pretty sure you were okay weight, but you went along with his play.
"Feed me, doc?" You tilted your head and smiled cutely and Ratchet grunted, feeling himself heating up when he saw the need in your pretty eyes.
He grunted and complained under his breath as he reached for his subspace and picked up a box of chocolate.
He didn't miss how your eyes sparkled and your smile grew when you noticed your favorite treats in the hands of your beloved and cranky owner.
You immediately crawled closer to him as he opened the box and picked up a small piece of chocolate. He noticed your eagerness and grunted, "Stay."
You stopped in your tracks, not moving even a finger. Ratchet tested you, moving the delicious treat in front of you, but you made no move to grab it. This was a test of your patience and you knew that the prize was worth a little torture.
Finally, your patience was rewarded as your owner nodded and offered the treat to you like one would offer a sugar cube to a horse, "Eat up."
And you ate the piece of candy, moaning happily around your sweet treat. You just loved good chocolate.
"You need all your strength for the night coming up."
"Is there a special occasion?" You hummed happily as Ratchet fed you another piece of chocolate.
"Only my little pet's birthday," He grinned as he saw your eyes widen in shock, "H- how did you know?"
"To make sure I don't do or feed my pet anything that could get them sick, I have access to their medical files."
"Oh. Oh!" You smiled as your hand wandered and gently tapped your owner's closed, but warm interface panel, "Is your little pet gonna get a present?"
"If they keep behaving then they just might."
"I'm going to spank you."
"Ooh...!" You absolutely moaned at that, "You're goading me to misbehave, Doc...!"
Ratchet did something he rarely did. He grinned, "I know."
"Are you gonna take responsibility if your pet goes into a frenzy?" You whined as you straddled his thigh and in your lust-filled mind started to rub your sex against him.
"I wouldn't be a good pet owner if I didn't...!" The doctor groaned as he grabbed you and set you lying down on your stomach on his thigh.
Before you could tease him you felt something hit your backside and you moaned, realizing it was his hand.
"One spank per year you are turning and one more for good luck. You're gonna need that when I'm done with you." Ratchet growled, "Am I clear?"
"Yes, Doc...!" You moaned and he nodded, "Let's start from the beginning. Count them!
That was the only warning you got before he spanked you again, and you moaned wantonly as you started counting.