This is some hermetic stuff. I recognize your wisdom, but I choose not to follow it. Though they may have been a very good path to truth, even if blurred, it was still muddled and ridden with tenuous cause and effect and confusing relationships.
Instead, I give you this, a sentence that succinctly summarizes your superfluous spiel.
"Every action and thought is learning. The more you learn, the harder it is to unlearn".
Your brain is made out of millions of self-reinforcing pathways, pathways that carefully remember every action you complete, every thought you imagine. The more memorable a thought is, the more likely you will be to return to it. The more successful an action is, the more likely you will repeat it. Silently, always watching, your own pathways are studying your own behavior, determining which work, which doesn't, and selectively reinforcing those that would better help your survive. The stronger the sensation, the more likely you will remember the sensation, whether bad or good. Your brain is quite adept at acquiring new information, judging, and storing the useful.
You are a machine of meat, specialized in information analysis, prediction and reaction. No other animal is as good as the Human in those departments.
The interactions on the spiritual and mental plane between succubi and men in your example can be explained through the extremely powerful perceptions and conclusions of your brain. Though it is unnoticeable, every movement, every slight voice inflection, every small behavior change is dully noted by your subconscious and then used and reused as situations demand, the ones that bring out the most success are reinforced, relearned, and then systematically become your self.
The succubus doesn't "absorb" your mana, but rather your own self, your mind, becomes tainted by the chemicals in your brain that reinforce the selfless behavior of giving, of sex, of masturbation. It rewards you positively because the circuitry in your machine are hard-wired to do exactly so, so that you will seek out to repeat the action whenever possible.
One must realize this simple fact: We are all biological machines. That is why there exists men that fight back, men that are not slaves to their own circuitry, men that exercise true Will. Once a man realizes he is merely a machine, he questions himself, not the world. He begins unraveling his truths, his wishes, his fears and his lies. To truly pierce Post too long. Click here to view the full text.