M - Girl measured my dick against her dildo while her 2 friends watched.

I felt I was very inexperienced in bed when I went to university, so I said yes to every opportunity I had. I rented a room in an area that was all students. My neighbours were a house full of girls. One time I was drinking with three of them. They were asking me questions, like if I had a girlfriend, how many girls I had been with and even which one of them I liked the most and why. Eventually they asked how big my dick was. I told them I was over 9 inches and they didnt believe me. One of them said she had a 9 inch dildo and there was no chance I was bigger than it. One of the other girls made her get it and they kept passing it round and holding it up to me and started grabbing at my dick. I was nervous and soft so it was fucking tiny. That just made them call me a liar even more. So I had to start playing with myself to get hard, the first 5 minutes nothing happened, but then I could relax and start to enjoy the situation. When I could feel I was getting hard I took it out and it kept growing without me even touching it. Seeing their face and hearing them go quiet was a huge turn on and once I was rock hard I could really start having fun and enjoying the situation.
I was shaking it and slapping it on my leg. Then asked One if them to hold the dildo against it. Then i got one of them to put her forearm along the shaft to show it was the size of their arm. One of them just kept holding it and stroking it slowly. She was the one who had been asking most of the questions, and the one I said I liked the most. So I asked or maybe begged, lol, for her to help me learn what to do with it.
The other 2 girls even joined in and told her to fuck me so they could hear what it was like. We ended up going to her room, kissing and playing with each other most of the night and then spooning and sleeping. It wasn't until the morning we woke up with my morning wood on her back, she kept grinding on it giving me an ass job, then she flipped it so she was grinding it like a witches broom or hot dog in a bun.
I was happy with all that but then, that was the first time a girl had grabbed my dick and guided it into her. So I was in extasy. After we fucked, I had a shower and was in the kitchen wearing only a towel. One of the other girls came in and told me the girl I slept with, said she had a great night. I was feeling super confident so I told her that her ass in the pyjamas she had on was making me hard. Then I took off the towel and showed her. I then went back to the other girls room and told her what I did. We ended up fucking again. About a month later the girl i had fucked told me the other house mate wanted to fuck me and that she didnt care. So we did.