We had a huge great dane growing up, her name was Eunace. When I was about 12 or 13, I really started to notice how big and fat her pussy was. I got super horny at that age, and when my parents weren't around, I'd play with Eunace. First it was taps and prods and then I found myself tongue deep in her maaaaassive cookie. I mean her pussy was the size of a tennis ball, I remember rubbing into my pillow as I burried my tongue in her and I ejaculated for the first time. No cum, just the feeling of coming. From that point on, I had a massive lust for Eunace, and eventually got her to have sex. First year of high school, I started smoking weed, and one time I got super high and horny. At that point, I had already been dipping the tip of my penis into Eunace, and just recently bottomed out; I even gave her a few deep strokes before she pushed me out. I knew she was ready. Parents were at work and I was so bricked and high that I felt determined to seriously fuck Eunace. I think she may have been in heat cause her pussy looked especially plump and tasted super warm. I suckled on her cookie for like 30 minutes and was rock hard the entire time. I definitely went into a trance, and before I knew it, the tip of my dick was inside of her pussy. She laid back, was a little curious, but let me bury the rest. I tried to take my time but once I realized that I was fucking a dog, I couldn't help but pistoning her cookie. I think it was about 10 or 15 seconds of the meatiest pumping I'll ever experience. I came right away. My toes curled and my eyes rolled back into my head as I pumped the fattest load of my life into her. I couldn't help but let out the loudest deep groan, I thought for sure someone heard. You gotta remember, these are high school nuts; I was still very new to the feeling. So this nut set such an insurmountable standard that I never went back. Eunace passed away when I was in college, I think about her all the time. I feel a little shameful but I actually bought another dane from the market place and I've been grooming her since. She's almost bigger than Eunace now, and I managed to convince the vet not to spay her for breeding purposes LOL. We're super close, and I can tell shes about to have her first heat. She's so big, I'm not worried at all about our first time.