I've owned 7 - but there have been countless randoms over the years.
When I was growing up, dogs simply wandered the streets and i was always horny for some fun. I was walking through bushland near my Sydney Australia house (Lane Cove National Park for those who know) and there on the track ahead was this massive Mastiff. Lord knows what he was doing there. I'd gone on a long walk and was heading to a swimming place deep in the park and he decided to follow me. Well you know the rest - foolhardy young risk taker who did things I would never do now. There is something magic about doing it outdoors in the middle of the bush and he did not hold back. Absolutely no encouragement needed. I put my towel on the ground, shucked off my shorts - kept my t-shirt on because I had learnt to my cost what claws can do - and he started licking me out.
That opened and relaxed me and he wrapped his forelegs around my waist and started poking and prodding. I reached around, gave him a little bit of guidance and once he connected, it was pummel time. I thought my boxer at home was large. This was something altogether different as the knot grew and he kept pushing it in and out of my puckering hole. Eventually the bulb did its job and he was locked inside. My hole clamped down on the outside and he started to turn.
I grabbed his forelegs and brought them over my shoulders and held him there. He then started pummelling again. A massive knot that turned my insides rubbery and throbbingly filled me with his juices. I don't know how long it lasted - my head was in outer orbit and my mind only had one thing in it - the massively pounding penis pummelling pushing panting performance that was going on.
He went deeper than I had ever felt before. Locked deep inside he eventually slowed down and simply lay there while he pulsed and pumped. I tured my head towards him and he licked my face and found my mouth and we tongued deep. I soon found ouy he had done this before. That did it for me. I love a dog snog and my twitching penis twitched spunk on the ground and as i did he felt my pulsing and pumped some more until deflated he popped out and a stream ran down my legs.
I love randoms. We disengaged and he followed me down to the river and we swam for a while - both naked.
As I was getting out, this guy rocked up - Max - there you are. It was the owner. Shit! He looked a couple of years older than me and he looked me straight in the eye - so have you two been having fun? I felt myself blush deep red and my dick gave me away. In short, it was the start of a great friendship with lots of sex. He was my first zoo friend and i still blush at the memories of the scrapes we got into and near misses having outdoor encounters.