they don't feed off the "cream", they feed off the "energy"
the cream is not the energy
a human gets exhausted after coitus as they spent the energy(calories), they don't go via the "cream", otherwise we could also eat the cream, and replenish the energy
or when me eat meat, the meat is not the one that gives us the energy, is the calories inside it, and the fuel are the vitamins and minerals inside it, not the meat itself
different thoughts about what they "eat" around the web
They drain energy from their victim by causing or taking advantage of sexual arousal or frustration. In the middle ages, monks, nuns, and other celibates were particularly unfond of these beings, as they manifested to them with some frequency, due to the sexual frustration which is often an innate part of celibacy.
Incubus and succubus experiences are usually pleasurable for the victim, and will only cause any problem if they are already extremely ill or weak, although they may not. Some vampires and vampiric magicians dislike these beings as they hate being drained of vital energy.
via sex
As your victim becomes more frustrated, visualise the trapped sexual energy building in them as a glow surrounding them, centred around their genitalia. You can gently siphon off and absorb this energy, by a similar process to that of more ‘standard’ psychic vampirism. You can also absorb a large amount of built up energy at the point of your victim’s orgasm, by visualising all of the trapped energy as being released into you at the point of orgasm.
Obtaining Energy By Glamour
This is basically a highly targeted combination of psychic vampirism. You use whatever glamorous techniques you favour, and monopolise the attention and sexual desires of an individual. You hold the individual’s attention, encouraging their desires towards you, all the while
drawing in energy from them by the techniques of psychic vampirism that I mentioned earlier.
The energy I feed upon is energy that is built between us, as static electricity is built between two conductive surfaces (only this energy is much more yummy and much more substantial), and as that occurs, no one is drained of anything essential to their well being. In fact, both of us gain from this looping action. This energy is also not exclusive to sex, though sex is a damn fine way to raise it. All I have to do is project my feelings at you to get your response and gain from that — but you gained from me before I gained from you. It is truly an exponential phenomenon and I have no reason nor need to do it any other way. It’s tastier when it’s inspired and willingly given. Don’t you agree?
If I desired to I could drain your energy or any energy you put out. I could do the same from anyone I come into contact with. It’s just not necessary, and it’s like letting a stranger stick their hand down your pants — not something that is often particularly attractive. And that’s true of many classifications (loosely applied) of spirit.
A succubus feeds and heals herself by drawing chi through the mouths of her lovers, friends, volunteers, or victims; and from the energy created from engaging in sexual activity.
Bo chi-drains human (101)
The succubus can kill someone by draining their victim of his or her chi. Although Fae can tolerate having their chi taken more than humans can, they are not immune from being injured or killed because of it.
here is a thought about what is sexual energy
Sexual energy doesn’t mean just having SEX. In terms of sexual energy being expressed as sex, my friend says humans have the opportunity to hold themselves as one would carry a sword—not too tight, not too loose—just right. When sexual energy is “leaking” and haphazardly spilling out all over the place, there’s an element of unconsciousness and irresponsibility. When sexual energy is consciously contained in the domain of sexual desires, when unconscious urges mature into conscious actions—that’s when the potential of sexual energy has the capacity to be deeply, wholey and holy experienced.
It’s natural to feel sexual. We as human beings are sexual beings. That’s a fact and there’s no way of escaping that. Get to know yourself and attune your sexual energy to where you want it to go and who you’re giving it to, who you’re receiving it from, who and what you’re engaging in whatever situation and or experience with. Own your sexuality and act upon it in an embodied manner vs. letting it control your every action and thought. Don’t let it run you as a wild beast—instead, use it to fuel and empower your decisions on how you will hold it instead of it holding you.