Word: estrogen
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Pfaus argues further that estrogen may be the ultimate love hormone for men as well. "A lot of studies on rats and birds," he says, "show that brains are like giant ovaries, in the sense that testosterone and other androgens are converted into estrogens in the hypothalamus. And this conversion appears to be critical to the expression of male sexual behavior...
Both testosterone and estrogen trigger desire by stimulating the release of neurotransmitters in the brain. These chemicals are ultimately responsible for our moods, emotions and attitudes. And the most important of these for the feeling we call desire seems to be dopamine. Dopamine is at least partly responsible for making external stimuli arousing (among other things, it's thought to be the pleasure-triggering substance underlying drug addiction). "Being low on dopamine," says the University of Washington Medical School's Heiman, "correlates with being low on desire." And in men dopamine-enhancing drugs (including some antidepressants and anti-Parkinson...
...Estrogen: Tablets (Vagifem), creams (Estrace, Premarin) and a silicone ring (FemRing) inserted into the vagina release estrogen to alleviate such symptoms of menopause as vaginal dryness...
...impotence. Both sexes experience failures as they age. And any number of health factors may be at fault, including poor circulation, diabetes, high blood pressure, heart disease, stress and alcoholism--to say nothing of the medications often prescribed for them. For women, the problem is often a decline in estrogen at menopause, usually around age 50. That may cause disconcerting hot flashes as well as dryness and a thinning of the vaginal wall that can make intercourse unpleasurable, if not painful. Production of the male sex hormone testosterone--which occurs in both sexes--also drops, and with that may come...
...lawyers talk these days about Viagra affairs and split-ups. Some doctors are prescribing testosterone as a libido booster for so-called low-T women, helping push up testosterone sales some 17 times in the past decade to about $400 million annually. Variously given as a pill combined with estrogen or as a patch, cream or injection, testosterone remains unproven as a sex aid. Meanwhile, it can cause oily skin, unwanted facial hair, a lowered voice and an upsetting onslaught of sexual fantasies...