Puppy up for adoption at the shelter.
Freshly washed and groomed, nails clipped, new shiny tag on your collar. Prospective adopters come and look at you every day, ogling and prodding you through your cage. Can't do anything but sit there and look pretty. You're fresh meat right now, pup.
Some of them request trial sessions. That's when your handler takes you to a private room—you're well trained now, so they don't even need to put you on a leash—where an adopter is waiting. There are toys lining the wall, a St. Andrew's cross to one side, spanking bench to another, all sorts of contraptions that make your puppy parts feel funny.
They have different requests. "How much pain can it handle?" "Show me your teeth, mutt." "Come here and eat me out, will you puppy?" You oblige. Of course you do. You make the appropriate moans and pathetic sobs as one person canes you. You suppress your gag reflex as another pushes his fingers down your throat. And you eat out the nice lady, who rewards you with a few cursory pats before turning to your trainer.
"This one is alright, but just not as good as the one from before. Can I adopt that one instead?"
It stings, but you shrug it off. You're not supposed to know what they're saying, anyways. If your handler finds out you've been listening to their human conversations, they'll surely punish you. So you kiss the nice lady goodbye and let your trainer lock you back into your cage for the night.
You get adopted eventually. Someone who blindfolds you and leads you to their car, firm hand in your collar. Like they're scared you'll run away. They don't let you go until you're firmly situated in your new home. New bars to keep you in place.
When they take your blindfold off, you squint from the sudden light. You wanna know who adopted you, puppy? Of course you do. Kneeling across from you is none other than your handler—the same one who brought you in and broke you and trained you, who hand fed you and nursed you back to health so carefully after beating you within an inch of your life. They're smiling something devilish, something fond. "You know I couldn't let anyone else have you." They laugh at your expression. "Don't make that face, pup. I'll never let you go."