How are how party leads to different pleasure

This is the story of how I came to be very submissive young girl.

This happened in the gap year I took after I graduated from HS. I was 17 and had graduated 3 weeks earlier. My birthday is in the beginning of August but I started sneaking out to go to parties when I was 16. I was know as a bj girl but I had not had sex yet. I drank way to much but I could deal. I gave 2 guys a bj but they were only interested in themselves.
One my way home I had to cut through a small forest to make sure I wasn't caught before I climbed a tree to get back inside. While walking through it, I heard noises so I crouched down behind a tree. I had on my black knee length boots and a black dress. I wasn't wearing undies cause I wanted to find someone to eat me. I listened for a minute but couldn't hear anything. I started to stand but I was suddenly knock down. I was sprawled on the grass and felt something on top of me. I tried to move but it was too heavy. I started panicking when I felt the bottom of my dress get pushed like someone was try to get under it.
3 things happened rather quickly, I felt something sharp on my shoulder blades, very quick panting in my ears and some thing very solid on my leg. I realized it was an animal, hopefully a kind one. I quickly found out it was friendly cause it was trying to mount me and have it's way with my uncovered and unprotected pussy. I tried to get up by as I soon was to realize, this only helped him find my pussy. He lunged forward and slammed my face in the grass as it entered me. I had no breathe as the sudden pain of my hymen being ripped and I was violently opened. At first I couldn't breathe and I started crying. It was pumping in and out so fast tha t I lost track of everything. It's finally stopped hurting me finally and was even starting to feel good. Then I felt this bulge pressed against me and there was this whole new level of pain inside me. Alone with pressure I've never felt before. I laid there as this dog turned me into his bitch. What felt like forever till suddenly he felt bigger then came what felt like a flood. It felt warm and like something warm and goey. Then I realized he had came in me. This thought suddenly made me start convulsing so much. When my head cleared I realized this dog raping me gave the biggest orgasm of my life and he was still in me. Suddenly I felt him going again and I was drug along for the ride. It must have been hours before he finally shrunk and he got out. I couldn't move! It was a long while before I could even get to the tree. It took all i had to get up the tree and back in my room. I stripped off my dress and barely got my boots off before putting on a pair of panties with. A liner and collapsed into my bed and slept the day away