A very "holistic" and "earth mother-type" friend of mine and I had a conversation about this in college. She was into what she called "white magic" and claimed that it was in her blood since she was 100% Irish and had a "white magic" grandmother, etc etc. I'm also 100% Irish, but don't consider myself to be a white witch.
Anyway, this girl told me that you can be very social and go out with lots of guys and girls, and all is well. But, if you like them and have an emotional bond with them - maybe even "love" them - then having sex takes on some sort of power. And consuming their semen is an ultimate act of joining, even more than normal sex. She claimed that there were studies showing that when a woman swallows her lover's cum, the semen becomes a powerful part of her physiology, and puts her and the guy in some sort of mystical synchrony, maybe setting up some sort of psychic connection between them. She said her grandmother told her that white witches in the "old world" would consume the cum of men they wanted to control ( the succubus in old mythology !) . I laughed at this and said that if swallowing cum was all it took to gain control, I was going to blow all my male teachers and "will" them to give me good grades, etcetc etc. I'd consumed a pretty decent amount of cum from a good number of guys at that point, so I should already have had a nice army at my disposal.
She dismissed that - telling me it was more than just giving blowjobs - it had to be done in the right frame of mind under the right conditions etc etc - and to learn those, you had to study white witchcraft. She said she had also given loads and loads of blowjobs and wished that all it took to control guys was to swallow their cum and digest it.
Well, girls - in my experience, some of the guys I know will do whatever I ask if they know an encore blowjob is part of the deal - all this stemming from having gotten one in the first place. Some of them prefer blowjobs. So, maybe there is something to this - not magic, but certainly psychology. Some guys I know absolutely love getting blown and having me swallow their cum - one guy told me he loved going out with me after I'd swallowed his cum - he just loved the thought that his cum was inside me, nourishing me .... In the meantime, I could pretty much set the pace for the evening - what we do, where we go, etc etc.... White magic?