Premise: I conceive sex as giving pleasure to the partner.
My pleasure is mainly to give pleasure, to make the partner enjoy as much as possible, my pleasure can come later, last.
That said, I had sex, fortunately for me, only with two virgin girls. I wrote "fortunately for me", not because it was not fun, indeed it was very nice, but to make sure that for them it was a beautiful thing, pleasant to remember and, above all, without pain, I had to commit myself a lot, first with the fingers, to prepare them, and of course I had them come a couple of times with a nice cunnilinguus.
They were very beautiful moments, very delicate, certainly exciting for both, but I, for the reason explained above, I was quite worried. In the end, however, everything went well. In practice, they have self-deflowered; I was supine and they were on top of me.
The most beautiful memory, in both cases, was their first penetrative orgasm, I had the pleasure and the privilege of feeling their embrace, their hot and sweaty body close to mine, their sighs in my mouth. This was my biggest pleasure. I would have certainly enjoyed (physically) more, if I had been a cowboy who would have added two notches on the rifle, but I am very happy to be as I am.