I saw the headline and had to read it, thought you might too.
Apparently there are three kinds of female orgasms, the volcano, the wave and the avalanche. These are different in the way the muscles contract during orgasm, which lasts longer than a male orgasm, sometimes more than 20 seconds. But you only get one kind, women rarely experience more than one.
This is all very scientific, they attached a device to the vibrator and asked women to help themselves. Interesting read.