I’ve had two girlfriends who unabashedly enjoyed giving head. My wife wasn’t one of them, nevertheless, we had a pretty great sex life. I’ve always enjoyed giving, in the same way you describe here, of being lost in the moment. Sometimes it’s better than others, but frankly, it’s as pleasurable for me to give as it is to receive. It might even be my favorite part of the act but the real enjoyment is derived by the shared pleasure and the emotional connection that enables the whole thing.