Want your female partner to try karezza with you? Choose the two weeks after her ovulation to begin.
A recent article in Scientific American Mind explains that levels of estrogen and progesterone both impact a woman's susceptibility to stimuli. Estrogen is the gas; progesterone the brakes. Well sort of. Progesterone apparently protects against impulsivity, and it is higher during the two weeks beginning with ovulation (the so-called "luteal phase").
The article explains that,
stimulants are far more pleasurable to women during the estrogen-dominated follicular phase, which occupies the approximately two weeks from the onset of a woman’s period until she ovulates, than during the luteal phase after ovulation, when both estrogen and progesterone are high.
A woman’s perception of other kinds of rewards—such as money, food and sex—may also vary during her menstrual cycle.
Researchers believe that estrogen spurs addiction by stimulating the brain’s reward pathways, enhancing the “high” from drugs. Administering estrogen to rats that have had their ovaries removed boosts levels of dopamine, a neurotransmitter involved in the perception of rewards such as food, sex and drugs.
This had major implications for women giving up smoking:
In a study published in 2008 Sharon S. Allen, a family medicine doctor at the University of Minnesota Medical School, and her colleagues asked half of 202 female smokers to try to quit during the second part of their cycles—when progesterone levels are high—and the others to make the attempt earlier in their cycles.
The results were stunning: 34 percent of the women in the first group had not smoked 30 days later as compared with only 14 percent of those who tried to stop smoking when progesterone levels were low. “When women are smoking early in their cycle, they’re getting more of a kick from their nicotine, more pleasure maybe, so it might be harder to quit,” Allen explains.
In this mix of hormones, brain chemicals and desire—as in many other parts of life—timing may be everything.
So if you want your female partner to feel greater contentment during the initial phase of a karezza experiment, it would be wise to begin the Exchanges after ovulation when she can work with her reproductive cycle.
And guys, don't try progesterone. It didn't make any difference for male addicts. You probably don't have the right receptors for it or something.