I can relate to your story. I had sex with other boys at a very young age. My favorite thing was getting fucked in the ass. I had two close friends when I was a young teenager that liked to fuck so I got to enjoy it often and about half the time it was both of them at the same time.
I only had sex with an older man once when I was 17. He was a friend of my friends family and no one ever found out about it. I worked at his house a few times knowing he was bisexual and we talked a bit before he took me to his bedroom and introduced me to big cock sex.
He was 54 years old and very muscular and hung like a damn horse. He was very gentle and used a lot of lube and pre cum and managed to get all of his monster up my ass without hurting me.
He had me face down with my legs spread laying on top of me with his huge balls between my legs and he was thick as hell and over 10" long and had a lot of pre cum which he put deep in my ass as he laid on top of me slowly humping my ass asking me if I was ready to be fucked. He put a huge thick load deep in my ass before he even fucked me then he held me down and pounded my young ass very deep and hard as his cum made a puddle between my legs and he fucked me until I almost passed out. He came very hard deep in my ass a second time and after getting me to suck his dick on my knees in the shower he took me to the den and bent me over the back of his sofa and fucked me while I moaned and screamed like a whore with his cum dripping down my thighs.
He spanked and slapped my ass talked dirty to me the whole time he was fucking me up the ass telling me to take it you little bitch! Once I left his house I wanted to go back the very next day but I talked myself in to staying away from him because I knew he would become a very bad habit for me. It was by far the best sex ever.
You guys will have plenty of memories when you're at the clinic.