They forced her at the movies

With twenty years old and due to my shyness, I barely had any experience with girls, but I couldn't stop being obsessed with sex.
I lived an hour away from Barcelona by train, and whenever I could, I would take the train and walk around the cabins of the sex shops, the peep shows, buy porn magazines, videos, and more.
I also started frequenting the X-rated cinemas, although when I first started going, I was unaware of the scene that existed there, as a place of contact between men.
When I went, I would sit in a back row, pull out my cock, and start jerking off while watching the movie. Sometimes, a guy would approach me, looking for action or to watch, but I would ignore him and get up and change seats or stop touching myself until he left.
Even so, I started to get turned on by all the movement of men in the room, people walking around looking for cocks, heads disappearing into the crotch of the guy sitting next to them, men standing in the back of the room jerking each other off.
I started watching how others did it when they coincided in the rows in front of or behind me, although when they tried to hook up with me, I would get up and leave.
One time, I was watching a guy get blown by another in the row in front of me, when a guy around forty years old came and sat down in a seat near me.
He pulled out his cock and started jerking off while watching the other two. He had a big, hard cock, and since he wasn't looking at me, I continued with my own jerk-off session. The man, to get a better view, ended up sitting next to me and commented, "what a blow job," and each of us continued doing our own thing until the couple in front of us left.
The man took my hand and put it on his cock, and said, "let's jerk off together?" and started jerking off, holding my hand, and I let him, feeling very embarrassed, and he searched for my cock, which had shrunk due to the surprise, and started touching it until it started to get hard again.
If I was jerking off with my right hand, he would put his left hand on my shoulders and start pressing down to make me lower my head towards his cock.
I tried to resist, but the guy told me he was healthy, and that he would do the same for me later, and I let him convince me, even though I didn't want to, until he put his cock in my mouth.
At first, I only had the glans inside, but he pressed down on my head, and started moving, to put more of his cock in. It felt like I was choking, and the guy pulled his cock out of my mouth and rubbed it on my lips and face until he put it back in my mouth.
It disgusted me, although I wasn't able to do anything to stop it. The guy started moaning until he came inside, pressing down on my head and forcing me to swallow part of his cum, until he let me go. I had a gag reflex and felt like vomiting, I spat out the cum that was left in my mouth, and went to the bathroom.
I tried to go into a stall, but it was closed, and I could hear moaning...