Well, the OP mentioned that the orgasm would have to be via oral sex… to be honest, I’ve never had an orgasm via oral sex, so I may not be able to answer the question in the best way.
(I don’t mind oral sex, it’s great foreplay, but it just doesn’t get me off. ::shrug:
But… if I have an orgasm any other way… well, it depends on the intensity of the orgasm. I’ve noticed manual/masturbation orgasms leave me hypersensitive. Intercourse orgasms are usually not as intense for me, and I can usually keep on going for a while (and in those cases, I can usually go for 5 to 6 orgasms).