What did he do to me?

Last night I bottomed for the first time in 2-3 years. The guy was pretty hung. If I had to guess 8.5x6. I struggled for a few minutes but then I was fine. However, I didn’t realize he wasn’t all the way in…

As he was getting closer to finishing, he grabbed me by the hips and thrust the entire thing in me. When he did, he hit something deep inside me. It felt like a tight ring. It was pretty uncomfortable at first, but once I relaxed it felt INCREDIBLE!

He gave me 4 or 5 more deeeep thrust and then I was done for. I came hands free for the first time in my life and I shot with the force of a cannon. Cum all over my neck. He came right after. For the next ten minutes I laid there unable to move, or think, in complete ecstasy. I’ve never felt anything like it.

My question is, what did he hit so deep inside me that caused that? And is it safe to do again? I’m going to do it again anyways. 😉