An Unexpexted Encounter At An Adult Store

something happened to me that I did not expect and I didn't know where else to vent. I am a 35 year old straight male, only had girlfriends my whole life. Came out of a relationship 6 months ago and have been watching a ton of porn. Recently got the idea that I wanted to try ass play solo, so I went down to a sex shop at 12:30 am right before they closed. I am sure I was acting awkward and went to the dildo isle, I was looking around and the shop attendant, I think also the owner asked me what I was looking for. I said I wanted something small and soft to start with. He showed me a few options an I settled on a skin like 5" dildo. I was about to go to the register, he looked me up an down and said: "wait up, if this your first dildo?". I said yes and that I didn't really know what I was doing. He looked me up and down and said, do you want that dildo for free and see some other ones they have. I said sure, he put his hand around my shoulder, I found it odd, but thought he was just really friendly. He walked me to a room at the back of the shop that was dark and basically pushed me forward gently. I was standing in a dark room with him behind me and I heard his zipper open. My heart sank, I did not expect something like that to happen and I just froze. He put his hands on my shoulders and turned me around facing him. I was about to open my mouth, but my heart was racing and my stomach clammed up. He put both his hands on my shoulders and said, we should christen your first dildo and pushed me to my knees. I was in shock and felt like this was a movie. This guy was short, but stocky, maybe 200lbs and around 50 years old. I am on my knees in this dark room trying to get a grasp and I can't see anything, he pushed my shoulders forward and I try to resits and gain composure. Then he takes one hand and puts it on the back of my head and pushed forward. His limp dick slapped across the face and he pushed me forward two more times. He grabbed my hair and pushed forward, I opened my mouth instinctively and his cock was in my mouth. I was shocked at how large it felt in the mouth, it barely fit in while soft and it had a musk. He started pushing my head on his cock and he got hard. I could take about half of it and he kept running it against my throat and I kept gagging. He grabbed my hair and dragged me a few feet and sat down. He started pushing my head down slowly at first and after about a minute he was aggressively fucking my mouth. Every time I gagged, which was a lot, he said good girl. I am on my knees with his cock in my mouth for a few minutes and then the lights turn on and someone walks in. I can't see who it is, this guy won't let me up. This guy says, you fuckers are having fun without me and I hear his zipper open. The guy fucking my face says, join in and keeps slowly fucking my face. I had no experience with anal, so when this guy tried to put it in dry, it was not happening at all. He got up, put his pants on and went to the front of the store. He came back with lube and put two fingers in my ace, which made me scream a little. I finally lifted my head and saw this guy. He was hairy and tall with a big cock that he was lathering up with his hand. The first guy grabbed my head and pushed it down and the guy behind me started pushing the head of his dick in my ass. I tried to scream and couldn't with this guy's cock in my mouth and it hurt a lot. I did not expect it to feel like that. He hit me in the back of the head and said calm down its only a half way in. He started pumping aggressively and I started crying. I could see out of the corner of my eye that the door to the room was open and there were other guys in the store looking at stuff and when they looked in the door they would look excited and whoo in our direction. This lasted about 10 minutes and the guy behind me came in my ass. The guy in the front came on my face. they put on their pants and acted like nothing happened. I put on my clothes and left the store. I left the dildo I chose behind. This was a surreal experience that I don't know how to feel about. My ass hurt for almost a week and I was bleeding for a day.