When a person fantasizes about another person (sexually or not, and with or without auto-erotic stimulation), two things occur:
1) They begin to create an intent, the directed energy of desire, which, if persisted in, gives rise to a thought form or tulpa made up of the accumulated energy of that intent/desire. Whether or not they ever intend to act on their desire, the person is effectively creating a surrogate reality in which their fantasy can become real. The person fantasized about then becomes - potentially at least - an active threat to that surrogate reality, for obvious reasons (anything they do that contradicts it will cause the fake reality to tremble and collapse). This is seen so often in cases when stalkers end up murdering the object of their desires, as the only way to keep them "in line." Also, once a thought form is sufficiently energized, the original person who inspired it might well be seen as "expendable."
2) The second thing that occurs, actually inseparably from the first process described, is that the person fantasizing is sending out energy threads to the person fantasized about, so causing a degree of entanglement to occur - even if the object is totally oblivious to the fantasizer's existence (as in the case of movie stars and porn stars). A movie star has already in a sense put his or her energy "out there" and made it available to the whole world. In the terms of Castaneda, they have made themselves accessible, anytime, anywhere, and to anyone who cares to "have" them. This is the nature of fame, both the price and the reward at the same time. So when a person uses images of a star to fantasize about, they are actually absorbing a piece of the star's energy (through the image) into their own. The reason stars don't shrivel up and die in no time is, I suppose, that they are receiving even more energy (probably a lot more) than they are putting out there, coming from these fantasies, and form the relentless, obsessive, attention.
The point is, however, that the person indulging in fantasies about the movie star is not only creating a thought form that follows them around like a kite thereafter, they are also forging an invisible tie - an energy thread - to that star. So the energy pattern created includes all three "parties": subject, object, and thought form. Whatever energy the subject can suck off the star s/he puts into the thought form; but at the same time the star would be able to draw energy from the subject, through the thought form. The star would then grow to resonate more and more with the tulpas created in their image, as a god that gains power from worship and bloodshed. The fan would become ever more dependent on, enslaved to, the tulpa s/he had created and, more subtly, to the star s/he worships, as his/her reality becomes ever more centered around them. (In extreme cases, the obsession becomes active psychosis and the fan stalks the star: the best fictional enactment of this is in Scorsese's marvelous film, The King of Comedy)
The tulpa, in the meantime, would grow ever more substantial and autonomous until, potentially, it took on a life of its own (which may coincide with the fan becoming fully psychotic?). Potentially, many different thought forms, drawing upon the same fantasy object (e.g., Marilyn Monroe, James Dean), would eventually overlap and form an aggregate energy field, and so become veritable "gods" of the postmodern world. They would be animated, I suppose, by the unconscious of the countless fans who "worshiped" them (and by their many ideas about the celebrities being represented).
