This story involves CFNM, exhibitionism, puppy play, anal and gay male sex. If you are offended by any of these, don’t read it!

I am fuckpuppy – a twenty-something year old human male who is happier being his mistress’s dog. I am six feet long when stretched out, and have a lean create, with a broad chest and flat stomach. My arms, legs and butt are toned with years of working out. My dick is uncircumcised, and six inches long when erect. My mistress keeps my dick, balls and butt waxed, so they are at all times clean and hairless for her use.

My Mistress is called Merry. She is tall and slim, with grey eyes and a ready smile. She is kind but firm. When she allows me, I love to play with her. To put my face in her crotch and sniff and lick her clit and cunt and asshole. To hump her leg. And to be fucked by her strapon.

My mistress jerks me several times a day, stopping just before I cum. As a result I am in a permanent state of arousal. Every time I am jerked, I hope this is the time I get to spray the floor with my semen. More often than not, she stops short.

I was lying contentedly at my Mistress’s feet one day, my legs spread wide as I’d been taught. Merry had her feet on me – one on my chest, the other resting lightly on my penis, rolling it back and forth. I was leaking precum like a faucet, hoping I would be allowed to cum, when she spoke up.

“I am going to take you to the doctor for a well-visit, fuckpuppy”

I paid attention. Mistress had never taken me to the doctor. What was this about?

I found out the very next day. After breakfast, Merry fastened a chain to my collar, and led me, on all fours, into the garage. She opened the car door. “In you go” I climbed into the backseat, head and arms first. Mistress helped me by holding my cock and balls.

After a long drive into the suburbs, we reached a country house in a large lot. Mistress stopped the car, and helped me get on the ground. The earth was soft on my hands and knees. She used the chain to lead me into the building.

We entered a room that looked just like a doctor’s reception area. There were chairs along two walls, and a lady at a reception desk. Mistress walked to the lady and checked us in.

I looked around. There were two other dogs in the room, with their owners. One was a female who knelt by her owner’s legs. Her owner was also a woman. The female dog looked content. I could see her hairless pussy from where I stood, glistening with moisture along her slit. When she turned around, I saw she had large pink nipples on her shapely breasts. I longed to lick them.

The other dog was a male, held by his female owner. He looked nervous and embarrassed, and was trying to hide his nudity behind his Mistress’ skirt.

Once we checked in, Mistress Merry looked around and saw the nervous dog. She walked to his owner with me in tow. “Hello” she said, flashing her friendly smile. “Your dog seems nervous. May we help calm him down?”

The other owner smiled gratefully. “Yes, thank you! He is a new dog, and needs comforting”

Merry turned to me. “fuckpuppy, help this dog relax”

I went around the human dog, and kissed his butt. I sniffed his balls and pushed my nose into his buttcrack. Behind me, I had some shuffling – I guess the female dog and her owner were watching us.

My exploring tongue reached the man-dog’s asshole, and pushed in. As I slowly tongue-fucked his butt hole, I could feel his ass cheeks relax. He started licking his Mistress’s outstretched hand.

“Good boy, fuckpuppy” My Mistress said. “You can lick his dick now.”

I didn’t need a second invitation. I turned around, and crept under the dog’s belly, and took his erection in my mouth. I swirled my tongue around his dick head, tasting his precum. Then I pressed my tongue on his slit and lapped. He moaned as he oozed.

Too soon, I felt the pressure on my collar as Mistress Merry pulled me back. “That’s enough, fuckpuppy. You do not have permission to make him cum”

The man-dog was panting. His legs spread wide, displaying his asshole, wet with my spit. His erect penis was bobbing with a life of its own, its large purple dickhead glistening with my saliva and his precum. In his aroused state, he forgot his nervousness. His owner patted my head, and held out her hand. I nuzzled her palm and licked it.

Just then, a door to the side of the room opened, and a nurse called out “We are ready for fuckpuppy”

My Mistress and I walked through the door.