The sexiest zoo experience would be the only time i let my german shepperd fuck me. I was alone at home and had been watching porn and jerking for some time. I went for a cigarrette break, and my dog was outside, very excited (he understood waht i had been doing...). He was really interested on sniffing my crotch... I finished my cigarette and got on my knees and started jerking him. In no time i was sucking him, and i tought i should try something else... So i went inside and took him with me. I undressed and went on all fours. He was really excited but didn't know exactly how to deal with the situation, and he was humping, my arm, my legs, but he wasn't able to understand how he should mount me, so i helped him. As soon as he got on my back, he started stabbing my butt cheeks with his cock, but always missing the target... I helped him aim at my butt, and when he found it... fuck... it was unbelieavable... He slided his cock all in me in just one movement and he started to fuck me violently... He wasn't able to knot me, because his knot was already big, and at the time I was thankful for that, but now i regret not getting knotted... I still remeber the feeling of his cum oozing out and running down my legs... It was amazig!