The last time, the ring's center had appeared to be black. This time, there was a pulsating green glow at its center. I gave one last thrust with the ring, coaxing just one more pulse of sperm out of my member before I pulled it off. The second it was clear of my wang, the ring's center faded away and it became once again just a hollow wooden disc.
After that, I found it impossible to stop. The ring was addictive; I could no more stop using it than I could stop breathing. If I tried to stop using it, I'd develop painful blue balls. And somehow, masturbation had stopped working entirely; the only way I could unload sperm now was through the ring. On the other hand, I'll be the first to admit that surrendering to the ring's dark seductive power felt damn good.
In some ways, things were good for me that semester. I discovered that the ring worked with any image or likeness of a living woman. On any given night, I would fuck actresses, supermodels, or even girls out of a catalog. There were a few occasions where the ring's center went red and I couldn't enter at all, and I learned through experimentation that that meant I was trying to enter a virgin. Merlin may have been a horny bastard like the old man said, but apparently he had taken steps to protect a woman's first time. I respected that, particularly since I could now tell which of the girls on campus were actually virgins. Not surprisingly, it turns out that fewer than half of the girls on campus who claimed to be virgins actually were. It was only a few weeks before I started overhearing students at the cafeteria talking about "ghost sex". Apparently they thought the school was haunted by the ghost of a phenomenal lover. I was surprised to learn that at least one of the girls had tried to touch the "ghost's" penis while it was inside her, but some kind of barrier prevented her from making contact. I took note of that for the future, even as I snapped a picture of their group with my cellphone. I was doing that several times a day, collecting pictures of girls all over campus.
Every day was spent snapping pictures, and every night was lying down with the ring and ejaculating into the pussies of the girls I'd shot during the day. As the days stretched into weeks, and the weeks stretched into months, I noticed changes in myself. I was able to climax 4-6 times a night now, and I'd wake up early in the morning to jerk off into a couple more pussies. Some weekends I would just stay holed up in my dorm room, occasionally working my way through a small sorority over the two days. Filling women with my sperm had become my life; I really didn't do anything else other than eating and studying.
I was starting to figure out the ring, too. Its center was usually black when I entered a woman, but sometimes it would glow green. On a couple of occasions, it was pulsing green like the night I fucked Brianna.
Speaking of Brianna, a couple of months into the semester, she announced that she was actually pregnant and expecting a child in seven months. Given that I'd fucked her right when I moved in, I knew there was a chance that the baby was actually mine. That's when I realized what the pulsing green light meant. I also realized I'd seen it several times since then. Brianna was talking to the anchors when I entered her, and she barely managed not to gasp when I entered her. When they asked what had happened, she passed it off as the baby kicking. It was impossible that early, but it saved her from trying to explain that she'd just felt a phantom penis penetrate her vagina. When I looked down at the ring, I could see that its center was glowing blue, then changing to green, and back again. At this point, I pulled out of Brianna instead of going all the way this time around, as I'd already changed her life enough for the time being.
****
A few weeks later, I unlocked the door to a fancy multi-million dollar beach house. The house belonged to one of my dad's friends, and I'd agreed to watch it for the weekend. For my part, I'd brought my camera and had decided that I was going to get enough pictures to satisfy my craving for a while. It was now March, and in California the weekend ensured that the beach was packed, and the heat wave ensured that the women were all nearly naked. Saturday morning, I was sitting in a comfy chair in the guest bedroom, looking out through tinted windows at a boardwalk which brought an endless stream of people walking by, as well as several sunbathers on the beach in front of the house.
My attention was being drawn to a young woman walking by below. She was tall and athletic, with a tightly toned body and a deep but even tan from exercising here in next to nothing just about every day. The only real regret I had was that I'd be unable to feel the rest of her body during our coupling, but I'd certainly feel the part which mattered. I was only wearing boxer's shorts, so I pulled out my cock and slipped my tip into the ring. My breath caught as the ring's center showed a pulsing green. If I was right, the pulsing light meant that she was ovulating like Brianna was when I entered her.
My cock slowly slid into the ring, my erection stiffening instantly as I watched the girl freak out. Her eyes narrowed in surprise as I bottomed out inside her, the tip of my cock just brushing her cervix. She put her hand over her pubic region, clearly feeling me as I entered her. I pulled the ring back off of my dick and then thrust into it again, and she let out a muffled gasp as I buried myself in her. I thrust repeatedly, watching her body grow more and more excited as I entered her again and again. She staggered backwards and sat down on a bench, inadvertently facing me and giving me a perfect view as I pistoned inside of her. For a moment, her legs were spread wide and I could see her vulva lips shaking with each thrust as my penis drove into her relentlessly. A wet spot in the center of her camel toe betrayed her arousal, spreading wider even as I kept pounding away at her pussy. Her swimsuit bottom shifted to the side and revealed one of her reddened pussy lips as I drove myself into her. Her face was a slideshow of conflicting emotions: sexual ecstasy, humiliation that this was happening in public, disbelief , and sometimes a flash of guilty pleasure that she was enjoying it all. I heard a muffled squeak from her as she started to climax, and that took me over the edge. I thrust long and hard, staying deep inside her as my cock began to spurt, injecting my seed deep into the pussy of this beach goddess.
I left the ring on as I recovered, enjoying the feeling of staying just barely within her pussy. I wanted to put my arms around her and feel her body nestled up against me, but that just wasn't possible. After a few moments of panting and recovery on the bench, she got up and started trying to walk on her shaky legs. I could feel the movements of her muscles coaxing my cock. If I hadn't been tired, I would've thought about going for round two - but the sensations were a bit too intense, so I reached into my pants to pull the ring off my cock. Just after I did so, she put her hand to her crotch to cover the wet spot where our fluids had just started pouring out of her pussy. She looked to one side and then the other, then took the towel she'd been sitting on earlier and wrapped it around her waist. I looked down at the pulsing green light, and brought up my camera to shoot a quick snapshot of her. If I'd just gotten her pregnant, I wanted to have a way to check back later.
A few minutes later, after my first fuck of the morning had already wandered off into the distance, I was rewarded with precisely what I'd been waiting for. An obviously pregnant woman was walking my way, her bare late-term belly swaying side to side. I fixed my stare on her and slipped the ring over my penis, entering her vagina. She was due to deliver soon, or so it appeared from how much room there was inside her pussy. I looked down at the ring, and saw that it was simply showing a solid blue. I tried with two other pregnant women over the space of the next half hour, and all of them showed solid blue in the ring. Unless I was wrong, blue meant pregnant, but blue and green (like Brianna) meant pregnant by me.