>>9128
Just be warned, they slobber a lot because they have giant lips.
My boy was basically built like a tall dane, but with huge stocky limbs, a big head (with a tongue the size of my entire face), and probably weighing around 180 pounds or more. His dick was just ridiculous. I've been taking medium- and large-breed dog dicks in my ass for 15 years, and his was the first one that literally made me too scared to ever try knotting with. Was like the size of a softball, attached to a shaft 10" long and nearly as thick as a can of coke. The size and girth and MASS of the thing was just amazing; it had to have weighed ten pounds.
I should have known his dick would be huge because his balls were, two. Like small potatoes. Makes sense that he had a lot of sperm, because he had a lot of cum (would just dribble and run out of my butt and drip down my balls and my legs). Once was never enough for him, either; he was the only mature dog I've ever had sex with that had no refractory period. As soon as he was done cumming in me he'd jump off and go back into his sheath, but if I went back onto my hands and knees, he'd happily mount and penetrate me again. The second session would take about the same amount of time (15 minutes), but a third mounting would only take a few more minutes until his cock shrank as he was probably mainly shooting dry at that point. If I let him, he would mount me several more times, but by then his dick wouldn't even get hard anymore. He just really liked being on top of me.
But by far my favorite part was the way he would kinda nibble and chew on the hair on the back of my head while he fucked me. He was much more gentle and affectionate than you'd expect from a dog so big and so hung. He was very intelligent, so it's possible he knew he could hurt me if he was too rough.
I miss him a lot, and the sex was incredibly fun (and messy!) but to be honest, he wouldn't be the kind of dog I'd like for a lifelong mate. He was just TOO big. I could never get knotted with him, his shaft was so thick it almost hurt, and just the positioning was difficult because he was so tall. I'm a small guy, so when I'm on my knees my butthole is about 17-18" off the ground, however, his dick was about 22-24" off the ground. I tried various methods to raise my butt higher to make it more comfortable, but nothing really worked. I tried stacks of towels, but they'd just fall over. I tried a box stuffed full of fabric, but it collapsed and broke apart under our combined weight. I tried a mattress, but it just compressed. I tried a wooden frame, but that hurt my knees like hell, even with a blanket over it.
But yeah. BIG dick.