I lost my anal virginity to a male dog. I bit off more than I could chew with the family guard dog in the middle of the night. He pinned me and tied with me, I consented by showing my rear btw, that said I couldn't get away from him until he was finished. He had a really strong grip. (And people want to argue animals can't consent, lol. I was the one that got pinned and taken... every time.) To give a better image, he was well muscled from constant digging and running and he was a short furred light brown mutt of medium size. He humped really hard and fast while nearly pulling me into him. He would leave scratches on my inner thighs through denim every time he mated me. Plus I was his first as well and he had definitely been in the family for a few years by then with no other dog to mate and no way out of the yard. My favorite part was when he would drool on my back and shoulders, especially if he decided to just lay on me after he tied. He was such a good boy.