Tentative theory on bipolarism:
So I don't know about all of you guys, but it's been awhile since I met a female, and it hasn't come out at some point, that she's bipolar. It is exceedingly common.
This makes me think it's a feature (or some side effect of a feature) of standard female psychology. And I think I might have it.
Females are evolutionarily wired to lack loyalty - which we all already know. And it's a practical and useful trait, in evolutionary terms.
One effect of bipolarism 
(at least in the bipolar broads I know) is an inability to be consistent in their perceived reality. They seem to make shit up, but it's technically not a lie - because they genuinely believe their own bullshit. And to a rational man (at her mercy in a gynocentric society), dealing with this trait is absolutely maddening. So why are they like that?
Well, I've long maintained that female psychology has evolved to be emotionally inconsistent. In a reproductive pairing (AKA a proto-family)
someone has to take charge, has to make decisions. And for reasons we all already know, that's the man.
But similar to the way an evolutionarily too-sterile environment can lead to allergies and auto-immune disorders... basically because the immune system is designed for a threat that isn't there, and is more or less bored... A woman's malleable emotions and perception of reality, when left to their own devices absent the enforced guidance of a male partner, will develop into what we call
Bipolarism is what happens in the absence of a pimp hand. With a pimp-hand, the traits that lead to bipolarism are beneficial... because they allow a woman to adjust to the conditions and decisions imposed upon her, without standing up for herself - which would be counter-productive to survival and reproduction.
To summarize: bipolar disorder isn't a disorder at all. It's a feature. The problem is female autonomy. I mean, maybe - the theory is tentative.
Cheers.