Mathematician have long studied population and came up with NORMAL DISTRIBUTION functions. What is obvious is any population is that small percent of people will be outliers.Majority of them will be in normal ranges. This is true for any human attribute. Sexuality, Intelligence, name it. What people in normal ranges should do is to understand there are outliers.For example i still remember this guy in high school who use to speak and act like a girl. I wouldn't be suprised if he does not get turned on by men and is most likely gay now. There are women who act, talk and behave like men. We know those people..they are our friends, neighbours, relatives,etc. These are outliers. You have very daft people. You have very smart folks. Then everyone else is in the normal spectrum.
Normal people should not dictate to "super-normal or sub-normal" people. As long as any act doesn't affect you; you should let people be...gays for one.
The outliers are a gift to humanity. Without them we would still be stuck at our normal base level....with other primates like monkeys..foraging and jumping around trees.
Without supra or sub normal sexual beings..we would still be engaging in sex like monkeys..we wouldn't know about foreplays,oral sex, anal sex (yes), orgasm, g-spot and all sexual advance we human have.
bittertruth, for me when I say "unnatural" I mean stuff that's plain for anybody to see: the "parts" don't fit. Square peg-round hole kinda thing. I guess that's why most people assume its a deviation instinctively. They can see that two things are being mis-"paired", like 2 left feet. Clearly one has not been designed for the other. You can find of all sorts of accidents in nature, like twins being born attached, hermaphrodites, sociopaths (psychpaths), children born without limbs etc. They are "natural" in the sense that they occur naturally, not engineered by us, but we can see they are disorders of sorts because we know what the whole/complete/proper condition looks like. So a bat's blindness is not some deviation, or natural "error", nor is our lack of flight because the healthy human is not made to fly, but if we are born unable to walk, we know something is not quite right somewhere, something's not functioning as its supposed to.