Well some orgasms can be considerably better than others and it usually relates to:
1. the build-up of mental excitement
2. the build-up of how long you have been having sexy time for
and generally correlates with the amount of jizz. It's why it's much more fun if a woman is daring, teasey or pushes boundaries because it pushes up number 1.
I often spend a considerable amount of time masturbating; if I push to finish in a couple of minutes I get a meh orgasm and might as well not have bothered.
For me any pleasure that doesn't come from the orgasm comes from the changes in pressure on my penis, and the buzzing sensation from my foreskin or other hopefully moist-ish surface running over the head of my penis. But it's of a very different quality to the orgasm, particularly the first one is more similar to when you stretch your muscles out, and I expect the second one is a lot like a standard clitoral sensation.
If you're ever concerned about the quality of orgasm you are giving a man, it's most probably mid-range. There is a lot of excitement because of the whole having a woman there doing it to you, but she isn't likely to push your buttons quite like you can do yourself unless she's had a lot of practice
Anecdotal though and I'm not so sexually experienced. Like I say you can be a tease or act naughty to up the mental arousal and improve his orgasm.