
Originally Posted by
Raza
It can be, but most of the time I don't think so. Human sexual tastes are dynamic and change throughout one's lifetime, and they have the potential to cover a wide range of 'orientations' - but most of us are born with a strong sexual desire for one sex or the other; usually the opposite, for obvious evolutionary reasons. It is possible to develop both repulsions and other turn-ons (and we all do so all the time), but it's extremely difficult, maybe even impossible, to negate the reproductive instincts we're born with. We may contradict them, being both aroused and repulsed by the same things, but this tends to create a lot of angst - a sort of sexual cognitive dissonance - and therefore isn't very healthy.
Today's social norms for the most part insist that we're probably either 'straight' or 'gay', and since conviction is the bigger part of how our feelings develop during our lifetimes, most people pick up the label that fits their reproductive instincts. Most people probably have the potential to be effectively bi, although our culture weights heavily against this (mainstream culture, that is - goth culture is an obvious exception, and the effects of this on its population are noticeable). However, I speculate that it would be quite impossible for the average 'gay' to become truly 'straight'; conservatively inclined homosexuals have tried and failed miserably.
You're on to something, but you have to keep in mind that human psychology goes beyond basic instinct. Reproduction is the evolutionary cause of our sexual instincts and mechanics being what they are, but that doesn't mean it's the exclusive reason for human beings to act in this context, or the only 'proper' one. Just like you can use a knife - which was made into what it is in order to cut things - to drive in a screw, we humans can take the psychological mechanics evolution has granted us and turn them to an infinite list of other applications - none of which are less valid than the one that originally turned out useful enough to cause it to 'evolve in'.
The important thing is that people have the ability to fall in love or lust after each other. How this came to be from an evolutionary perspective is irrelevant to the ethics of what we do with it, just like the fact that the water in a bucket we're holding at one point vaporised from the sea and then rained down has nothing to do with whether we should drink it or use it to wash our car. Reproduction may have caused our feelings to work as they do, but this doesn't make it a 'better' reason for having those feelings, and we don't need a special ceremony like marriage to exclusively honor people that indulge love and lust for that reason rather than the bazillion other possible ones.
Now, you can argue that all other reasons come down to 'fun', insofar as that every action we take is motivated by feelings that could be categorised as either pleasant or unpleasant, and we generally act to stimulate the pleasant ones while avoiding the unpleasant. But by this reasoning, seeking to reproduce is also 'just for fun', because the only underlying reason we act on our productive instincts is because they feel good to us. Most people choose to believe that they do things for reasons other than fun - even if it secretly does come down to this in the end - and they want ceremonies like marriage to make it feel significant and meaningful. I say none of these illusions are any better than the others, so either they all have marriage, or none do. And banning marriage for the sake of it would be pretty silly.
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