I suppose it was the very first time I saw him naked. He had such a lovely body, like a pre-pubescent girl. I knew those testicles would eventually begin pumping out enough hormones to change that body. It would become more muscular, covered with more hair. I wanted to prevent that more than anything.

Besides, Stevie's low-hanging scrotum was the only flaw in his perfect body. Seeing it dangling between his legs kept reminding me of how beautiful he'd look without it.

Being a normal, healthy teenager, Stevie was almost always horny. But I made it clear that I wouldn't be giving him any relief, that he'd have to jerk off alone when I wasn't around. This was the first step in my plan to eliminate his own sexuality, to neuter him.

He'd sprout a boner when I fucked him, but I'd slap his hand away if he tried touching his stiff cock. He'd whimper from sexual frustration, but after awhile he'd content himself with running to the bathroom after I finished fucking him, madly jacking off on the toilet.

In order to connect his genitals to pain instead of pleasure in his mind, I decided to circumcize Stevie as a first step. A friend who has done many genital mods - including castration and penectomy - came to our house to perform the simple procedure.

I told David that there must be no anesthesia whatsoever. In fact, I asked him to maximize the pain if possible. He agreed to this.

Stevie dropped his panties and stood naked in the kitchen as David attached the clamp to the head of his penis. He winced and complained as the sensitive foreskin was compressed by the stainless steel, but I told him to keep quiet.

As per my instructions, David attached the clamp more tightly than usual, making Stevie cry out in pain. I ordered Stevie to keep still. David picked up his scalpel and began slicing away the foreskin, slowly and deliberately. Stevie wailed as his little cock lost its sheath. After a couple of minutes, David dropped the bloody strip of skin into a wastebasket.

Stevie's cock was plenty sore for the next few days, but before long he began sprouting erections again. I knew it was time to move to the next step.

I waited until I caught Stevie masturbating, which I had warned him not to do. My new instructions were clear: his only ejaculations were to come during his sleep, in wet dreams. If I found him jerking off, he'd be very sorry.

So when I came home early one day and found him madly pumping his cock in the living room, I knew my chance had come. I ordered Stevie to go into the bedroom and wait for me to administer his punishment.

After letting him wait for about 15 minutes, I came in and sat on the bed, ordering him to lie face-down across my lap. The sight of his lovely butt staring up at me, with the large black butt plug firmly wedged between his cheeks, gave me an immediate hard-on.

I began with light slaps. I spanked his right cheek a few times, then the left one. The skin began to pink up, and Stevie started squirming.

After a minute or so, I started applying more force, leaving red imprints of my hand on both cheeks. Stevie was really wriggling now, pleading with me to stop. But I noticed that his hard penis was rubbing against the inside of my thigh. My own cock was also rigid as Stevie's lithe body squirmed against it.

Now it was time for the real punishment. After a few minutes of spanking, the blood had risen and Stevie's cheeks were bright red. I picked up the thin leather switch and gently rubbed it over his butt.

"I'm going to hit you three more times on each cheek," I told him, stroking his hair gently. "It's going to hurt a lot. But it will be over fast."

Stevie was crying now, pleading with me to stop. As I looked at his delicious bubble butt, brilliantly red, I thought it would almost be a shame to permanantly mark such a beautiful thing.

Almost.

I brought the switch down rapidly on his left cheek.

WHACK! WHACK! WHACK!

Stevie screamed at the top of his lungs as three angry red lines appeared on his butt. His body convulsed, and the friction against my cock caused it to spew its cum.

As my orgasm erupted, I repeated the assault on his right cheek. As the switch cut into the tender flesh, Stevie again let out a shriek.

After catching my breath, I went to the bathroom to get a wet towel, leaving Stevie sobbing on the bed. I gently dabbed the towel on the bloody cuts, talking to him in a soothing voice.

"I told you what would happen if I caught you touching your penis," I said, pressing the towel against his ass.

"But I can't help it!" he wept. "I get so horny."

"Nevertheless, you will be punished each time you masturbate. You will be whipped up and down your legs. You'll have marks all over your back. Is that what you want?"

"No! I don't!" he sobbed. "But I can't stop jerking off, either. Isn't there some other way?"

"Perhaps," I said, smiling.