I use the same technique and it is pretty amazing if you can get yourself to back off

Same here. sometimes I can stop myself and sometimes it just feels too good and I can't help but let go!

Some time ago, I read a medical study which stated that the length of a female orgasm, on average, lasts only 2 to 6 seconds long; somewhat like a male orgasm. However, in the case of a woman, she may have either one long orgasm or several multiple but seperate shorter ones appearing as one.

A women’s ability to get multiple orgasms in one sexual intercourse is, of course, the advantage of a female orgasm. But only about 30% of women are able to experience it. The main feature of a multiple orgasm can be described as follows: after passing the phase of excitement and staying at the plateau phase, a woman is able to experience a series of orgasms without phases of resolution and secondary sexual arousal. It's been described that there are 4 phases: Phase of Excitement, Phase of Plateau, Phase of Orgasm, and the Phase of Satisfaction.

Female ability to experience several spontaneous orgasms a day is not the same as a multiple orgasm. An orgasm can occur during a sexual intercourse, masturbation and mechanical friction (for example, clothes friction on the genitals) or shake in the public transport. A woman easily tunes on a sexual wave and is able to achieve orgasms many times a day in the most uncommon-for-sex situations.

In the normal situation, a human brain receives powerful erotic signals during a sexual arousal phase, and sexual arousal occurs step by step. All stages of a sexual process are under control in this case. If agents do not have anything to do with sex, for example, if this is fear, stress, or anxiety, the body ‘jumps’ over one of the stages, and an orgasm occurs spontaneously.

In the Excitement Phase, some women get sexually aroused when you touch their nipples, breasts, thighs and genitals, while others get excited when you stimulate other erogenous zones. Fantasies, erotic dreams, music, different colors, certain thoughts, the expression of affection and passion can play a big role in causing sexual arousal.

In the Plateau Phase, it occurs when muscle tension in the pelvic area reaches its peak. Pulse quickens to its highest rate. Women breasts become fuller, the clitoris and the vulval vestibule swell. The uterus is lifted in the pelvic area. This is all controled by hormones released into the blood stream from the Pituitary Gland and the nearby Hypothalamus in the human brain.

In the Orgasm Phase (also called the climax), it is characterized by strong rhythmic muscular spasms in the pelvis, accompanied by sweet sensations and relaxation. Women experience the muscles of the vagina, clitoris and vaginal walls contract. Men experience the ejaculation of semen as a result of contractions of the muscles in the base of the penis. The intensity of sweet sensations varies and largely depends on the situation. Again, external factors play an important role here; stress, anxiety, alcohol, fear, or mood. It was believed that vaginal orgasm that occurred during normal sexual intercourse was much stronger than the orgasm cased by direct stimulation of the clitoris. However, Masters and Johnson have proved that the orgasm is always the same from the physiological point of view even though the perception of orgasm can be different (stronger vs. normal). Both vagina and clitoris are involved in it.

The ability of many women to achieve orgasm during sexual intercourse with their partner is formed gradually with age and experience. Women often need clitoral stimulation in order to achieve orgasm. They need clitoral stimulation even after the penis has entered the vagina which men can go without. Still, about half of American women can’t achieve orgasm during sexual intercourse.

In the Satisfaction Phase, a person is fully relaxed and gets a feeling of well-being and pleasure. The erection, breathing and heart rate, and blood flow get back to normal again. The duration of this phase may vary. Some women can experience multiple orgasms, one after the other. They don’t need recovery time. Men require a refractory period during which they recover to be able to have sex again. The duration of the refractory period lengthens with advancing age. Its duration varies from a few minutes to 12 hours.

As you can see, there are many factors which are involved. What you describe as REALLY good, any only be physiological yet normal.