Kair said:
I've heard several times from biologists that bisexuality does not exist. You have to be either. Bisexuality is either insecure heterosexuality or insecure homosexuality.
Arguements have occured periodically about stuff like this. The bottom line is that sexual attraction is largely a chemical reaction. This has been proven despite people's attempts to argue otherwise. Generally the "humans are not predictable animals in any way, shape, or form, we're all unique and wonderful flowers and our emotions and drives are mystical and unique and in no way attached to biology or science at all" is very popular because part of being sentient and individually aware is an inherant dislike of being characterized. This feeds into psychology, sociology, and tons of other things that people hate, but arguably can't deny.
Things like castration work on both people and animals because once you remove the organs the chemical reactions more or less go away. It can be touchy because of the way these chemicals interface with the brain (which means some drive can be left even if the equipment is altered) and right now we simply don't understand enough about how the human brain works though we can do a lot of things with it.
The debate over bi-sexuality is largely because it's something that makes no natural sense, except as a genetic defect, since someone is arguably reacting chemically to both genders. Hetero and Homosexuality can be both defended scientifically, hetero sexuality needed to of cours emaintain the species, those who want to get away from the contreversy of calling homosexuality a disease/defect and portraying it as something wrong with people will oftentimes defend it by saying that it's a genetic reaction to overpopulation, to prevent healthy people from breeding, despite their working sex organs.
The basic idea being that it's believed people have instinctive defenses against overpopulation, and a sort of "chemical network" emitted by people (Pheremones, etc..) causes brains to more or less reverse attraction if there are simply too many people. However as sentinent beings we can overcome these defenses with will, which is why our population is still exploding. Also no natural mechanism is going to be absolutly perfect. The idea being that by this theory homosexuality increases with the level of overpopulation, and also if there was a sudden catastrophe that greatly reduced the human population, homosexuals would "revert" to being heterosexual as a species survival mechanism. Of course without a massive apocolypse and/or more study of the brain we simply won't know. Brain research being heavily limited by the simple fact that people can't engage in nazi-like experiments which arguably limits the aquisition of knowlege (note that I'm NOT saying that this morality is a bad thing, simply that it's a factor).
Not sure if anyone else answered, but I figured I'd ramble a bit on the subject in case anyone is interested.
Truthfully though those of you who have read my other posts will know what my sexual orientation is (straight) and all this rambling aside, what my overall thoughts on sexuality are. Nothing that I feel is appropriate to get into here, and frankly little would come of it that is constructive.
The basic point being that things like this are a hot topic, and it's of course closely tied to politics and morality. It's pretty much impossible to do unbiased research on the subject. Unless some kind of asexual space alien arrives and lays things down for us as a true outside observer, it's doubtful we'll ever have any kind of an answer to issues like this that people will accept.