I don't know how someone can fuck or get fucked by mistake but I have had situations where one thing led to another and in the heat of the moment things went beyond what was agreed upon. One particular experience comes to mind when a guy from my neighborhood asked me for a ride to his apartment. We knew each other from high school and lived in the same neighborhood. We often saw each other at the park where he was often playing basketball with other guys from the neighborhood while I was at the park working out. I was walking to my car and he was walking in my direction when he approached me and asked me if I would mind dropping him at his apartment so I agreed. Looked like the basketball game he had just left was still going on so he was leaving early for whatever reason. Once we were both inside the car he started some small talk and finally got to the question that he was curious about which was if I was gay which was rumored. I carry myself as masculine so unless someone knows me personally they don't know my business so I figured he'd heard through the grapevine from someone that must've exposed me for some of my activities. Back then I had a few experiences offering my oral services to guys around the neighborhood but thought nothing would be said about it because most of those guys were either closeted or claimed to be heterosexual. I've never denied the fact that I interact with men on a sexual basis so I didn't feel the need to this time. Once his suspicions were confirmed the convo then took on a more sexual tone because he was trying to get his dick sucked on the low. He directed me to a specific parking lot on an end of the apartment complex that was hidden and more so used for hookups. I remember being parked next to one of those large industrial sized dumpsters which completely left my vehicle hidden from view. I was nervous that someone would walk up and catch us but he assured me that If I was as good as he'd heard then our time there wouldn't be very long. As I'm parking and looking around nervously he's already pulling his basketball shorts and boxers down to his ankles. Any hesitation I had in the moment soon left me once I saw his large flaccid uncut cock and large heavy balls waiting for my attention. It was like a mouth magnet because before I knew it my head was traveling in the direction of his big juicy cock which was also thick and veiny. I distinctly remember as I was taking his cock into my mouth smelling the distinct smell of the sweat that surrounded his balls from when he'd been playing basketball earlier. Within a matter of seconds his cock engorged in my mouth and the precum was already coating my tongue so I knew this guy was really horny to be producing precum so soon. Not once did I look up at the owner of this beautiful penis that had gotten extremely hard for me. I was focused on the task at hand but I was definitely aware of the moaning and heavy breathing that was going on just a 2 feet above me. The guy was aggressive in that he'd sometimes push down on my head and hold me in place before releasing his grip which was fine with me. I don't mind some aggressiveness and is actually turned on by it sometime even if i'm almost at the point of gagging. I'd say 8 minutes went by of me sucking his cock and alternating to sucking his sweaty balls before the moment of climax was upon him. He couldn't hold back any longer and within a matter of seconds his hands gripped the back of my head and was pushing down hard and his cock was balls deep in my throat when I felt the tell tale signs of climax hitting the back of my throat in upward of 8 strong warm squirts of warm salty fluid. After everything was said and done he quickly cleaned himself up with a napkin that was in the side panel of the door and had pulled his shorts back up. He led me to another area of the apartment complex where he wanted me to drop him off which was closer to the unit that he lived in with his girlfriend. I pulled up near the area he requested and as he was opening the door he gave me a fist bump and told me he would see me around with a wink of the eye and told me "thanks for the ride bro." Needless to say I started giving this guy rides from the park on a pretty regular basis and would often align my workout schedule to conclude once his basketball games would end. The second time we hooked up he told me I could call him PJ which was probably a fake name but I didn't care. PJ and I continued to hookup from time to time until I moved to another part of the city. I know the original question was about accidental fucks but what PJ and I were engaging in started off as an accident in my opinion and could be called a face fuck because he was often very aggressive with controlling the rhythm at which I sucked his cock.