[[WMG:Muraki's curse is a metaphor for AIDS]]
He gave the curse to Hisoka while abusing him, which, after years of illness, killed the young man. This implies Muraki is sick himself, and would explain why he's always trying to feed on the lifeforce of others, and is fascinated with immortality, yet isn't poetically associated with vampires. This has added weight, since the show is rife with [[Main/BoysLove gay overtones]].
** He's a predatory older man, and does seem to have a weird thing for blood, even if he's not strictly speaking a vampire...
** He is technically a psychic vampire, but that doesn't get brought up much after volume one. The vampire motif isn't brought up that much after being solidly established in the Nagasaki arc where the rape and murder are revealed. But vampirism doesn't have much to do with AIDS, not even in media depiction. At least, not in so much as vampires=gay=AIDS. Not discounting the theory, as it seems reasonable, just pointing out.
** It was transmitted as part of rape and killed him slowly, but I'm not sure it quite hits the metaphor level. Because really, what would it be saying except Rapists Can Kill You Slowly, Too?

[[WMG:Chief Konoe was present for Tsuzuki's first descent into the insanity which lead to his suicide. He may have had a hand in it, which is why he's so tolerant and protective of Tsuzuki.]]
** How is this wild? Remember what Sagdalius said? 'I know all about that night...I even know about you, Konoe!' Where's the ambiguity here? That was before Tatsumi usurped Konoe's place in the main casting by Power of Bishie, so even if the series resumes (which it won't) it's likely it'll never be developed, but it's solid.
*** That's still pretty ambiguous. Sagadalius didn't actually say what happened on "that night" or if Konoe was directly involved, just that he "knew about" Konoe. Also, FamousLastWords: the series has been off of hiatus for over a year at the time of writing this segment.

** This troper says: The Count is the father or other ancestor of Tsuzuki, as indicated after that damn party. Tsuzuki has demonstrated his incredible 'hanyou powers' a la Abe no Seimei, the Japanese Merlin who was supposedly half fox and who was the last person to have Tsuzuki's set of shikigami, and King Enma and the other people running the world want to use him in some way. They make reference, when they turn up in context of Konoe reporting to them, to their plans for Tsuzuki, the fact that Tsuzuki can't get away, the fact that they apparently killed off Muraki's grandfather Yukitaka to prevent his interfering with said plans (!) and so on.
*** FridgeHorror: If the count is related to Tsuzuki in some manner, it makes all the scenes where he molests and sexually harasses him a ''hell'' of a lot more awkward.
*** Wait, what's this about Muraki's grandfather being killed off by "them"?

** Way back in Tsuzuki's adolescence, this plan went into its first stages by sending a set of their goons, the shinigami, to force his powers to show themselves. Konoe was part of that team, and followed his orders in manipulating Tsuzuki into flipping his lid, causing the deaths of his family in the resulting power surge. For which Tsuzuki unfairly blames himself, Konoe with more justification blames himself, and Enma blames himself not at all as he is god and doesn't need a conscience. Even Muraki has more morals than this guy, although they assert themselves only as shards that prick him under the ribs and drive him to more frenziedly immoral behavior in reaction against.

** All of this so that Enma could get Tsuzuki squarely under his thumb, which he has done, and wait for the opportune moment to do whatever-it-is. He 'spoke' to Ashitarote, King of Demons, to get Tsuzuki out of his job as King of Dragons, which was apparently a sort of right-hand job to Ashitarote--don't know what the King of Hell can pull on the King of Demons to get his way (considering that despite translation these aren't mutually inclusive domains), but whatever it was, it was worth it to him.

** So only Konoe knows what's really going on, and the fact that even in their farcical daily life they are merely pawns of a cruel god. The Count may know something, too, and you'd think that as a Noble of Hell and clear supernatural being he'd be able to do a little more than Konoe, but apparently he's either helpless or has some kind of uninvolvement policy he can't break under these circumstances. So want to see the Count and Summons Department forming a subversive organization to free Tsuzuki and break Enma's tyranny. Muraki provides assistance and possibly dies (seriouslyforreallthistimehahaha) in the process, and Enma is deposed and his son takes over.

** Then Enma-loyalists in keffiyeh will take over the Ministry and threaten to blow up the world as a religious gesture. No, that's what happened in ''YuYuHakusho''. Plus, that Enma actually had a son.

[[WMG:Hisoka is a girl.]]
(I don't know if chapter 76 has been released or translated into English yet, so please excuse me if this has already been jossed/confirmed.)
Ok, so we know that in Hisoka's family, the firstborn son has to take over as head. And it turns out that the current head, Nagare, had a daughter born first who was also named Hisoka. She was apparently killed as soon as she was born for being a girl, causing her mother to commit suicide and Nagare to take another wife who would give birth to the Hisoka we know. Tatsumi's original theory upon investigating the Kurosakis was that Hisoka was [[AbusiveParents treated badly]] by Rui not only because of [[TheEmpath his powers,]] but also because he was the child of the first wife. So if we keep this idea in mind, the possibility that the girl Hisoka was kept alive and raised as a boy (a la FruitsBasket) seems much more likely. To back my theory up:

->1. In the HotSpringsEpisode, Hisoka refuses to join the other guys in the bath, not wanting them to see his body.
->2. He's upset by the fact that, due to his death, his body won't develop any further physically.
->3. Perhaps most damningly, Terazuma transforms whenever he touches a girl. In the tournament arc, he transforms upon touching Hisoka.
->4. In a sidebar, when talking about the cast for the drama cd, the author mentions that she felt Hisoka should be played by a woman.
->5. IIRC, the manga never shows Hisoka's bare chest.

* Jossed by the fact that Muraki, the person who raped him and therefore saw him naked, refers to him as male
** When Hisoka has a nightmare about Muraki on the Queen Camelia, we see his (decidedly male) bare chest several times. There is also a panel that looks like Muraki pleasuring him orally [[http://mangafox.me/manga/yami_no_matsuei/v03/c001.1/117.html (bottom left).]]

[[WMG:Tsuzuki has ''angelic'' origin.]]
* He's definitely not human, as hinted at constantly - but it's never out-right stated he's of demon descent.
* It would explain why he's much sweeter than what one would expect of... well, the opposite.
* It would be an interesting twist; it's been hinted at so much it would just induce an eyeroll from this troper if he turns out to be a demon.
* Sargatanas calls Tsuzuki a 'black sheep' (allusion to fallen angels, maybe?) and a 'poor little lamb' when he possesses him. Also, Focalor is outraged that 'a mere human' should inherit Sargatanas' position in Hell. Shouldn't those two (especially Sargatanas) be able to somehow sense it if Tsuzuki were partly a demon?
* Ruka calls him an angel in the Book Arc as well.

[[WMG:Alternatively, Tsuzuki is half ''kami'']]
and the Count (or maybe even Enma himself) is his father. They do look rather similar from what we've seen so far.

Being the son of a deity would explain his powers, such as the ability to control '''12''' of the most powerful Shikigami. The Count is also the Lord of the Castle of Candles; it should be easy for him to keep Tsuzuki's candle burning, thus effectively preventing him from dying while he was still mortal (until Enma interfered?). After the party in volume 9, the Count says that Tsuzuki's smile makes his life in the Castle easier (apparently he's imprisoned there - punishment?) and he asks the others to keep an eye on Tsuzuki for him. He even calls Tsuzuki "the only treasure he has left". Tsuzuki himself also says that "the aura of the Count felt somehow very familiar".

As for the Count's [[ChivalrousPervert behaviour]] towards Tsuzuki... maybe Enma wants to keep them apart, to eliminate any influence that might interfere with his grand schemes (whatever ''those'' may be) and this is the only 'inconspicuous' way he can be close to his son... yeah, it's a big stretch, I know.

* Given the implication that Asato and Ruka may have been in an incestuous relationship, the gross behavior probably doesn't even need an alternative explanation. If the count really is Asato's father and their family name really is Tsuzuki, it could just be how the Tsuzukis roll.