Story Time:
Many years ago when I was a still a wee teenager, I started off wondering about dog penises and sheaths when I was around 17 years old. They look inviting and I always want to know what a fur covered dog sheath feels like in my hands. It was a mixture of inquisitiveness and amazement. The first dog sheath I touched was a desexed Malamute from a dog shelter. His name was Sky. Feeling a little bit apprehensive, I gingerly grabbed his sheath. It felt so soft and furry in my hand. Gripping this sheath, I felt his slightly firm, non-erect penis within it. I later found out I was touching his os penis within his penile shaft. I was young and "innocent", thinking to myself that I have just stroked a "forbidden zone" of a dog. It was taboo. However, the experience somehow got me so aroused I eventually masturbated to it that evening. It felt good and I wanted more.
Nearer to home one day, I saw a friend's Golden Retriever boy showing his lipstick, which got even more curious: What does a dog's penis look like when I pull back his foreskin? I wanted to extrude a male dog's lipstick to find out! However, I did not get a chance to find out for a while.
Forward to 19 years old me, searching on the interest for masturbation-worthy material eventually brought me online to view zoo-porn videos on the old BeastForum. Videos clips there taught me how to masturbate dogs. As part of my curiosity again, I really wanted to try it on a real male dog. With some luck, I had access to an intact young adult male Border Collie named Russel. Russel was really friendly and chill. He was a gorgeous looking boy and loves attention.
My family's female dog soon came on-heat and my mind delved to Russel. Out of sheer curiosity, I wanted to know if I can masturbate him to ejaculation while in the presence of a female dog in-season. Coincidentally during that time, my family had to head out for the morning for errands and I was left alone at home. I took that opportunity to have Russel come around to meet my girl. He bee-lined for her the moment he saw her and was very interested, kept sniffing her out and licking her vulva, tail wagging furiously. As Russel was doing that, I proceeded to grab his sheath, hold his penis behind his knot and stroked firmly (as I learnt from watching those videos) and began masturbating him. My heart was pounding the whole time, feeling a mixture of nervousness and excitement. He started thrusted hard and fast, fluid shooting out from his penis everywhere on my kitchen floor. He started to swell up pretty quickly, knot engorging. I kept my grip behind and around his knot the whole time. Eventually after around 10-15 seconds, he gradually slowed down his thrusting. Eyes staring blankly at the floor a distance in front of him, body tensed, back arched, mouth closed, cock pulsing rhythmically. The floor was wet. I assumed he had just ejaculated, his penis now fully erect, deep red in colour and visibly engorged with webs of numerous blood vessels. It might be his first orgasm. For me, this Border Collie boy was my first male dog sexual experience.
Still holding his knot, I looked at Russel's glorious red rocket with amazement, thought to myself - oh wow, achievement unlocked. I took several moments to admire the thing and the thought came in my mind that I should at least try to see what the fuss is all about giving male dogs oral stimulation. I was initially hesitant about putting his erect cock into my mouth but at that moment I was so sexually turned-on I didn't care so I proceeded to take him into my oral cavity and engulfed his shaft (first oral experience). Immediately I felt wave of disgust with myself but that feeling turned immediately to excitement and a massive surge of arousal. I cannot believe I am actually doing this, I told myself. It is so gross but it felt so good to put a dog's cock into my mouth and I love it! After what seemed like about 15 minutes later, he started becoming soft, I knew he was done. I assisted him by gently placing his penis back inside his sheath. I immediately proceed to jerked off and cummed in about 7 seconds, I was so hyperaroused!
After that session with Russel, I was completely hooked and the seed was planted!