The key word in your question is “sometimes.” You see, the fact that sometimes you (I mean this gal) orgasm is incredibly validating and rewarding for the guy. It then becomes a benchmark of success. The irony is, it is women who never orgasm in bed with a guy that eventually lets guys off the hook. Sure, This girl enjoys herself, the dude thinks, but she never orgasms. That’s how it was 4 months ago, that’s how it was tonight, that’s how it will be four months from now. And so her orgasm becomes a non issue. A dead issue. You, or the other vagina, are somewhere (or more accurelty “sometimes” in the middle.) Which is of coure an %100 OK place to be. But dudes being who we are – might stress us out.
As for feelings of guilt or worry, those aren’t the exact words I would use. Guys, who are tied to their lady’s O as proof positive of sexual prowess may feel inadequate and down on themselves. Their ego will live and die by your climax. That’s really on them. As you point out pleasure takes many forms, many moans, many turns. Don’t worry about him, he will evolve. Worry about nothing. Isn’t that always the quickest way anyway?