I Wouldn't Have Guessed

Two weeks ago I had anal sex with my gay neighbor. We have known each other for the last six months and I knew that he was openly gay. In fact he teased me several times, saying how if I ever wanted to do anything just to let him know.
Well, we have become fairly friendly and I was over at his place and we were having coffee.tet
He teased me again, and I suppose that I was in an inhibited mood, so I teased him back, saying what did he have in mind. He laughed and said how he wouldn't mind me doing a quicky with him.
I said, you Jean like ... Intercourse?
He said, why not?
So he stood up and took his pants down and leaned his hands on the table. Like I said, I must have been feeling in an uninhibited and receptive mood. I stood up and took my pants down and found myself having no problem in achieving an erection. He had some lubrication which he applied to my boner and I went ahead and pushed into his anal opening and I began to F him.
It took about three minutes and then I ejaculated. All I can say is that it felt so incredibly satisfying to be giving him my sperm like that as another guy.
I really was not expecting this. But it was so gratifying and meaningful.
Since then I have had sex with him one more time and it was just as pleasurable and fulfilling.
Now I don't know what to think.
I really would love to have my boner in his butt again and to keep doing this with him.
I am just at a quandary as to what I should do. Anyone have any advice?