Sakana I think this theory is pretty solid as is.
Perhaps we could finish the write up on this theory and then find a new theory to discuss after the christmas season.
The PNP(Power and Point) Theory; Drug Abuse in Gensokyo
(Note this is just a brief summary..a full write up will take place some later date)
(here's a general structure we could use)
Basic Overview
The girls are addicted to PNP, which has since become a prime motivator for investigating incidents.
Origin
Probably with the world, I'm too lazy at the moment to reread the thread to find out exactly what it is. Sakana you could do this part because i honestly don't remember what we decided on for this.
(nevermind found it)
According to Naito, the magic in Gensokyo is declining over time, and the only creature that can still absorb it are faeries. For a youkai to gain power, they have to then kill faeries and take the absorbed magic for themselves. When a faerie is "ripe", the youkai will kill it and the magic energy inside it becomes PNP and is absorbed by the youkai.
Gentlemen, we have discovered an actual food chain in Gensokyo! The fairies and F.O.E.'s are the plants, the lesser youkai (stage 1-3 bosses) are the herbivores and the greater youkai (stage 4-6+X bosses) are carnivores. The player characters are omnivores!
Method of Retrieval
PNP is gathered by just about every living creature that uses magic, which includes faeries, human magicians, youkai magicians, youkai, dieties, and especially shrine maidens. Frankly the only being that doesn't actively gather it is rinnosuke. PNP is absorbed by the characters via magic and the energy is stored as option shots or the hitbox. PNP is released when a faerie is killed. Some beings also have a hard time holding on to it, and release small amounts of it when attacked.
Interestingly PNP attracts more PNP, and as the time flies by, more and more PNP is stored up. This is why in the more recent games the characters can POC without max power. The exact increase is unknown, but according to this diagram:
http://i49.photobucket.com/albums/f299/mew777/Noseriously.jpgThe increase is likely substantial.
Effects: Grants the user greater power, this power manifests in the form of option shots and can be released in concentrated bursts as bombs. The points grant extra lives as one collects enough of them, but how exactly this works I'm not sure.
Detriments: PNP abusers love the rush of energy the stuff gives them and so find reasons to get more. Fortunately or unfortunately, depending on your point of view, faeries are a plentiful renewable source of PNP. The results aren't hard to predict:
http://i853.photobucket.com/albums/ab98/Twilight0402/FairyStalked.jpgAnd this is bound to happen a lot. Just think, why is the red-white miko so eager to investigate new incidents? Faeries tend to collect PNP like it was candy.
Side Effects: Youkai like obtaining this as it seems to be a key part of their evolution. I'll let OkashiNaito explain:
http://img187.imageshack.us/img187/6930/wriggleevoltion.jpgThree major side effects noted by Okashi
OkashiNaito: Regarding the effects of the drug and it's addictiveness, I think they aren't really like normal drugs. They don't cause a real high, just slight delusions of grandeur. They resemble steroids more than anything, since they both function to power the person up, not to give them a pleasurable feeling (atleast not directly). Not sure if the PNP itself is biologically addictive, but I can sure bet the power that comes with it defiantly is!(mentally then, not biologically) Especially Marisa shows traits of thirst for power.
Three Signs
Sign One: Reimu's sickenly yellow skin color she has in MoF. Tough seen as a coloring failure by ZUN, it might have more meaning to it. According to the Gensokyo timeline on Touhou Wiki, there is a two year gap between PoFV and MoF. In between this time, without any incidents, Reimu hardly had any possibilities to hunt youkai, and thus gather PNP. In that time, she had a extreme shortage of PNP. Because her body has become addicted to PNP, it started to attain an unhealthy skin color from lack of PNP, resembling going cold turkey in real life.
Sign Two: Sakuya's bust size. Like we have concluded, gathering alot of PNP in a short amount of time let's the body grow. Youkai even go from childlike to mature with enough PNP. Meanwhile Sakuya's cup size differs vastly between games, being flat in 6, 7, 8 and 9, but sporting cleavage in the fighting games. Tough the fans have explained this with the notion that she wears pads, maybe the body growth resulting from PNP consumption is the true culprit. Sakuya may be human, but the PNP could still have some youkai like side effects on humans. Think about it. Before 7.5 came along, she had enough time in 6 and 7 to collect large amounts of PNP, and she uses knifes, not magic bullets, so she doesn't use up even near as much energy as Reimu and Marisa. The PNP started to build up in her body, and as a rather comical side effect, it mainly collected in her breasts. This resulted in her noticeable bust in the fighting games. During the fighting games she got beaten up so hard she lost her PNP making her lose her cup size. During 8, 9 and 10 she had more than enough time again to collect more PNP to build up her bust for 10.5 and 12.3.
Sign Three: Character ageing. Though many years have passed in between the games, ZUN himself stated that Reimu and Marisa are still 16 years old. They should be twenty according to the timeline, yet they are still mid-teens. Perhaps the PNP is having youkai side effects on them too, and it is starting to slow or even stop their ageing?
I'm pretty sure I missed a bunch of things, but this is only a start on the write up to come.
The write up continues...