Forcefully Sucked Off

This happend when I was 15. I took some wrestling classes and most of my mates were the same age as me. We always got assigned random partners every class. That day my partner was dave. He was a year older than me and about 20cms bigger than me. He was also much stronger than me so during most exercises I lost. It was normal at this place that the last class needed to clean up the lockerrooms. By cleaning I mean picking up all the trash in the lockerroom and after that lock up and place the key in the box near the trainers office. Everybody except me dave and the trainer already left. So me and dave went to the lockerroom and showered. After we did that we were standing in the room in our underwear. Dave turned to me and challenged me to a wrestle and the loser would be the one who would need to clean and lock up. The rules were that the one who would lay on their back for about 3 seconds would lose. We got in position ans started. We got in a scramble pretty quick and before I could do much I was already laying on my back. I did my best to change position and get him off but he turned himself around. He was now kneeling on both of my arms and pushed my legs down. I was still trying to get him off but he was just way heavyer and stronger than me. I told him that I had lost and he could get off me. "Hold still" he said and I felt his hand sliding under my boxers and pulling out my cock. I cussed at him and tried to get him off me. I couldnt move my upper body and he drove his thumbs inside of my thighs. It hurt really bad and during that time he shoved his head down and took my dick inside of his mouth. I realized that I couldn't do much and stopped trying to get him off. He stopped driving his thumbs in my thighs and pushed my legs down with both hands with my cock still inside of his mouth. His tongue swirled around the head of my dick and after some time I got hard. When my dick got hard he got his mouth off me for a short time to talk. "You like it stop acting like you don't" he said and took my dick right back into his mouth. He continued to slam his head down on my cock for the next few minutes. I felt myself getting closer to orgasm. I don't know how he noticed but he started to deepthroat me really fast and with a lot of force. I had never had anything else than my own hand on my dick before so I couldn't hold it for long. I started to cum and he held his head still for the first time waiting until I pumped every last drop of sperm down his throat. He then licked my dick clean shoved it back into my boxers and got off of me. He then got up dreassed himself and left. I layed on the ground for some time before I got up trying to understand the last few minutes. After some time laying on the ground I got up dressed cleaned locked up and left. That night at home I couldn't stop thinking about dave forcefully sucking me off. I felt digusted since I had never thought about doing something with another guy until that day but somehow my dick couldn't stop getting hard. I jerked off at least 3 times that night thinking about the feeling of daves mouth on my cock. I don't know if this is a thing but I think this experience somehow sparked something gay in me witch is the reason I call myself bisexual right now.