He slowly pushed it in, and I was surprised how easy it was, given he was only using spit. It only hurt for a few seconds each time he pushed deeper, until he was most of the way in. Because of his length, he pulled back and pushed even further a few times until it was all the way in. Now the pain was gone and I felt a strange full feeling. He started moving and I was amazed that it actually felt good, which I told him but he just laughed, I guess he was having too much fun.
He pulled out and I missed it immediately. He put me on my back and held me down with his strong arms and started fucking me a bit harder now. We started kissing again and I wrapped my arms and legs around him. I just let him control me and move me into any position he wanted, which turned out to be a lot, and he fucked me harder in each. Any time we couldn't reach each other's mouth, I was moaning, and he was grunting, and I said stupid stuff like I loved his cock.
After about half an hour he said he was going to cum, and I told him he could do it wherever he wanted. He wanted to breed my ass and make it his, which I'd never thought about before but turned me on for some reason. He had me doggy style again and I felt him stop, cum, and pull out. He teased me by asking if I was still "mostly straight", then we stood up and made out some more while I held his cock.
He asked me to stay over night, but it was after 10 and I had to get home or my parents would wonder where I was. I imagine if I had stayed, he would have fucked me again before we slept, then again when we woke up, breeding my ass each time and really making it his, I was very tempted. But we got dressed and kept kissing as I made my way to the door.
He asked me to come over again a few more times, but for some reason I never felt up to it, maybe I was really mostly straight after all. I've never been fucked again since then though, so I guess my ass is still his, but I definitely have a thing for older guys now.