from what I understand...
-sexual energy roughly correlates to jing qi, not necessarily the jing itself - but jing qi isnt necessarily limited to 'sexual energy.' (kinda like all humans are mammals, but not all mammals are humans.)
-Chia does talk about using qi from elsewhere, i.e. heaven & earth qi - but that doesnt equate to jing qi. from what I've read it is more absorbing the qi and combining with your own, pretty much for kan & li balancing (qi absorption this way probably isnt super efficient and unless you are sufficiently practiced and sensitive, you probably wont feel subtly enough to make use of the practice and will get more benefit from other practices appropriate for your level of experience. proper practice necessitates doing the right practice with the right focus at the right time in your training, depending where you are in your training and what your goals are.)
-3...that doesnt equate. borrowing qi from the earth is not the same as using a person to balance your own qi with no reciprocity.
-4...no, that's for balancing your qi...I'm not sure what its called - a method of kan & li?
-energy and essence are two different things.
-a woman will absorb little unless she knows techniques to make it more efficient. I guess oral is still technically absorbing qi, only its an entirely different mechanism than penetrative sex - therefore I would surmise that the absorption is that much less efficient due to the process of it being digested as opposed to being absorbed somewhere in the sexual organs.
Get the Root of Qigong book, it will shed a lot of light on these basics for you.
Darth...from how I understand everything (eastern, western, everything..) you only really 'lose' prenatal jing when all parts & functions arent functioning within normal operating parameters (i.e. driven down to sub-standard.) Provided you dont waste enough jing (sex, drugs, rock n roll, however...
) to whack out any pertinent parts, you should be allright. I can understand it from a point of view that if you do harm yourself, then that will necessarily reflect on the status of your jing. (trying to figure out how to put this properly...) My assumption is that as long as everything is in good working order, you should be fine. So in that regard, would prenatal jing ostensibly include your body's capacity to replace what has been lost? (So if you are in good working order then your body should be able to replenish itself, but if you drain to such a level that your capacity to replace has been affected, is that more what's being referred to when prenatal jing is spoken of?)