I'm a bull now but actually never expected to become one when I was in my teenage years. It all started after I was 18 years old. During my teen years, I was super horny. My GP has warned me about my above average testicle size and how it can impact my fertility and desire to mate, but I kinda didn't listen. When I finished highschool and applied for university study at my age of 18, in order to finance my studies, I found a job in a sperm bank as a database administrator. Later I started donating as there was a promise for additional payment, and had the necessary health - never drank alcohol in my life, never smoked, always exercised and had a healthy diet. Plus of course, I needed some extra finance. Long story short, there's a woman coming to the clinic and she asks me some guidance questions in the hall. Suddenly she turns the story around and asks me if I'd be willing to donate for her privately, for a smaller fee as the IVF procedures have exhausted her budget already. I agreed, assuming it would be artificial home insemination, but boy I was wrong. Along my altruistic self and the consolation that I am doing a good deed, especially for a woman in her late 40s (46 or so, whatever the chances were), she was an absolutely hot woman, great looking with younger than her age appearance. The moment we arrived at her place she started undressing me and pulled out my cock. Me, 18, totally inexperienced, I was hard as anything you'd pull out of a deep freeze refrigerator. With 20cm stiff cock and low hanging balls, I could notice her pussy dripping clear liquid while she was removing her panties. I've never seen a woman leaking such a crystal clear stretchy liquid so much. Couldn't hold myself and I grabbed her. The moment I put my cock in her, I could feel it slide in to the end. She's moaning hard. I raise my head and I see a small reflection in the cilyndrical metal handle of the bed. Someone is peeking from outside the bedroom through the barely opened door, or at least I thought so as I understood that she was not married, but that was not the case. Her husband was indeed watching, which I realized later. I just increase my tempo, the lady is moaning, her natural red hair is spread through the bed as she's laying on her back, holding my ass with her hands and pushing me towards her in, while her legs are wide spread. Then I feel I'm gonna cum, and she just closed her legs around my back. The level of cum I released was insane, she was overflowing! I stayed like that for 15 minutes at least. Then I got hard again and continued one more time. This time I came less but it was also very intense. She was sore and couldn't get up. She said only "sorry, I'd make you a tea now but can't, feeling so good". I got up after half an hour and dressed up and left. We met once again in the city, she showed me a picture on the phone, a small ultrasound seed growing inside her, I was petrified! My first experience and something like that, plus a married lady, which she said she was sorry for not telling me earlier. It didn't matter afterwards, when I saw her few months later on the beach (in my country where I'm from), she had a big belly growing. To be honest, she looked beautiful and I was proud but unfortunately the consensus is that the child knows his father to be her husband. Anyways, that was an unforgettable experience for me and how I began being a bull. Since then, I had multiple such encounters and they mostly progress from the request for sperm donation. From the time of writing this, I'm expecting three more such encounters and I will share the experience afterwards if course 
I still keep the conversation. How immature I was back then, it was obvious fro my reply. But was how it was
I still keep the conversation. How immature I was back then, it was obvious fro my reply. But was how it was
