I realize that this discussion has ventured into decidedly unscientific territory
On this we agree, though ecstasy can be approached systematically.
The "edging" technique following long periods of abstinence described by kikai93 can seriously stress and potentially even damaging effects on the CNS if sexual energy is not properly circulated. From experience, the side effects can be worse than any stimulant (and I've been on Adderall for four years) and can do serious harm. While l the technique described can be immensely pleasurable and incredibly beneficial for energy levels, depression, and overall health, I would advise any novice against practicing it without first reading some Daoist or tantric literature to learn proper breathing, energy circulation, and energy ventilation techniques.
On this we do not agree. Typical religious literature, with some few exceptions, is as likely to confuse an aspirant as it is to assist. Typical religious literature of this type is an admixture of useful information, social mores, and rank superstition.
Simplified, one must simply: Be in good health. Learn to sit still. Learn to breathe. Then learn to concentrate. With these tools, very little in the realm of meditation or sexual technique will pose dangers to health or wellbeing. The very little would be extremes of ascetism or ecstatic activity (one could presumably dance or fast to death, for instance). In the 17 years I've engaged in these explorations, I have yet to encounter anyone seriously damaged by a reasonable approach to meditation, sexual alchemy, ecstatic dance, etc.
What typically happens is people overreaching themselves (a gentleman having his wife to stand on his legs to help him achieve the lotus asana, a person attempting to engage in extended or demanding practice from zero experience or training).
What I described is unlikely to result in harm, because the practice is self-limiting. Anyone with the requisites to successfully engage is unlikely to be susceptible to inability to circulate or integrate.
