>>25110
I'll never forget the day I saw this in the wild.
I encountered a group of stray dogs, back in those days lots of dogs had free-range lives.
A very large golden retriever had taken an intense interest in a brute of a male Rottweiler, and there was play and rough-housing interspersed with the golden enthusiastically and deeply frenching the rottie's giant asshole, both were intact and that Rottie had one of those holes that just had no fur around it.
The rottie was enjoying the attention as he stood stock-still while being rimmed, even leaning into the muzzle of the golden, who looked like he was trying to get his whole face in there. Both of them were sporting erections, with the Rottie, though sheathed, appeared to be almost fully hard, his sheath bulging to the max and knot like a fist, the engorged tip just peeking out. He wasn't squirting that I could see, but there was no doubt he was feeling good.
The golden wasn't as hard but he had quite a lot poking out. Then, he went for the mount. My heart was racing! Would this happen?
Sadly, no- though I am sure penetration was achieved, as soon as that rottie felt the golden shove his cock up his ass, he growled loudly, turned and bit at the golden, and the golden wisely jumped off and away, then play resumed, and repeat. Licking, anticipation, a mount, a warning, play again. I watched for several minutes.
Eventually the rottie ran off with another dog, and I did coax the golden over to give him a handjob which he desperately needed. (couldn't risk more, place was too public though this was a wooded area) Anyway, so close!