"Just go slow," I told him. He began to push the head of his cock into my ass and I grunted as he did, closing my eyes and focusing on my breathing. There was some discomfort, but it was surprisingly not bad. He kept just the head of his cock inside me as I got used to the feeling of him inside me. After a minute or two, I told him I was ready and he pushed a little further into me. I had my eyes closed the whole time, concentrating on my breathing. We kept this up for some time, each time he would push a little further into my ass and I would take time to get used to it. Finally, I heard Mark say, "I'm all the way inside your ass now." I opened my eyes and could see he was pushed all the way into my ass. "Fuck, you are really tight too. And you seem to really be enjoying it already," he laughed, gesturing towards me. I looked down to see what he meant and realized my own cock was not only rock hard, but it was throbbing. "I'm going to start fucking you now, ok?" he asked and I could only nod again, closing my eyes and focusing on staying relaxed.
Mark slowly slid out of me, then began to pump himself into my ass, slowly at first, letting me get used to him fucking me. As his hard cock pushed in and out of me and I could feel it pushing into my prostate, I began to experience the most intense pleasure I had ever felt before. I didn't know what was happening to me, but before I knew it, I heard my own voice moaning, then speaking, "Oh god yes, fuck me." I couldn't believe I'd just said it, but I was no longer in control. The pleasure washing over me had taken complete control of me.
And it must've really turned Mark on too, because he reacted to it, grunting to me, "I knew you were going to love it being fucked in the ass. Yeah, take my dick." He picked up the pace, fucking me harder now and drawing bigger moans from me.
"Oh yes, don't stop! Fuck me harder!" I heard myself saying. I was completely insatiable, loving how it felt with his cock pounding into my prostate. I had gone from being a virgin just half an hour ago to begging for him to keep fucking me. I didn't want the feeling to stop.
Mark pounded away at me, telling me how good it felt to fuck my tight ass, and before I knew it, he was all the way inside me, his body shuddering as he came. Slowly, he pulled out of my ass and went to the bathroom to get rid of the condom. I felt so empty right then, but was still panting from the fucking I'd just received. Suddenly aware again of my own throbbing cock, I reached down to touch it. I barely stroked it at all before I came all over myself, shooting cum all over my own chest and face. And because I had my mouth open from breathing so hard, some of the cum landed in my mouth.
Mark happened to walk out of the bathroom and just that moment and saw me cum all over myself and swallow my own cum. "Oh shit, if I'd known that was going to happen, I would've pulled out and cum in your mouth so you'd have two loads to swallow," he laughed.
"Next time," I told him. I couldn't believe I was already talking about a next time, but I was so eager to be fucked again, I just couldn't control myself. Mark had brought out a side of me that I had been completely unaware was there, a completely insatiable slut for cock. And I couldn't wait to get some more.