What's the Difference Between Ejaculation and Orgasm?

Dear Dr. Betty
What is the difference between orgasm and ejaculation in women? And in men too, for that matter?
Dear R,
Good question: When a man ejaculates too quickly (as in premature ejaculation), the sensation is not all that satisfying. It's a reflex that has no build-up behind it. An orgasm that follows a period of time of building up pleasurable sensations will be far more satisfying. Not that coming fast doesn't relieve some tension, but the quality of the pleasure experienced is minimal.