I believe any GENUINE attraction between human beings is prompted by our inborn love and desire to be with our Creator, by the faint glimpses of his various perfections we see in our fellow human beings.
Whether you're talking looks, personality traits, etc.... either we are drawn to some quality God possesses perfectly or is perfectly Himself, or else a perverted/twisted/sick mind may be drawn to some perverse exaggeration or perversion of those traits (like a girl may be drawn to an abusive man, by an exaggeration or perversion of her natural desire for the natural order of things... the man being the head and the leader, etc.).
ɧoɱosɛҳųαƖity, on the other hand, has always been (I believe) much more oriented toward the love of VICE, rather than even a perverted love that was originally geared toward some good. Like Chant says, mostly they're obsessed with sinful pleasure. It is definitely frequently caused by abuse or sinful encounters. But I think that in our age, there is an element to this growing crisis that may not have existed in any other age before.
Even in the age of Sodom, I believe human beings have always acknowledged what is natural to mankind, even though they may have gone drastically against it. The natural feelings of a human being, natural (genuine) friendships, etc... all were acknowledged even if defied or perverted.
I don't believe that ever before has mankind been so radically insane in it's moral and mental order, as to insist almost universally that human beings do not and must not have emotions or deep emotional attachments to other human beings. That there can be no human emotions, virtually, except for anger and lust. That any positive emotion outside of anger (and sometimes including anger or hatred) can only be lust. But today, society has brainwashed itself into believing these things wholeheartedly. EVERYTHING is called lust today. Even the natural feelings between parents and children, are perverted in "psychological" textbooks (more like trash books) into lust or forms of lust. Anything you can say, anything you can draw or write or anything, can be made by the people of today into something related to lust.
I have long contended (partly because I have seen it personally, and therefore know it to be true in some cases), that it is this complete, insane denial of the full natural range of human emotions, and the full, normal, healthy range of deep and meaningful human relationships, that is throwing gas on the fires of the rank perversion of ɧoɱosɛҳųαƖity. The young people of today are being told by society that they may not have any love, any kindness, any compassion, any sorrow... in short, any emotion or virtue in their heart, especially in relation to another human being. At best, they are taught to "love" everyone in so grossly wrong a manner, as to turn off their moral compass completely. But we are all human beings. We DO have emotions. We do (men and women alike!) have emotional needs. We DO need real, deep and meaningful personal relationships with other human beings. But today we are told that if we do have these things, we are weak, or that all of our feelings towards another human being amount to lust. Is it any wonder why, having been literally shamed out of all natural virtue and affection, the young people, growing up in an atmosphere and society that mocks God and religion as ancient superstitions (eg, without the religious compass to keep them on course in spite of society), these young people are turning to shameful outlets for feelings they have been made thoroughly ashamed of?
Regrettably, I believe we will see ever more and more people saying they are ɧoɱosɛҳųαƖ or "bi." Yes, because first of all, there are lots of perverted people out there doing these things or teaching these things to the young people. But also because today the young are born into a world that teaches them there is nothing more shameful or disgraceful than all natural feeling or attachment. Having already had their family lives utterly destroyed by this attitude at home (whether by abuse, or else because the parents were brainwashed in the same attitudes before them, to be cold and indifferent and cruel), it is no wonder if girls are so desperate for anything like motherly or sisterly affection they turn toward one another, and then, led astray by the notion that all feelings are lust, call themselves lesbians? Or if the young men, so desperate for anything LIKE love or kindness from their fathers, turn to one another, and mistaken by the same notion, call themselves gαy? And tragically, with the men, it seems once they get into that life, they DO tend to turn toward abusing people. If they have been taught to be ashamed of every natural feeling, and equally they must be ashamed of every unnatural feeling, it's no wonder if, having lived already a whole life in shame, they can so easily cross such boarders into atrocities, unthinkable to any morally sane person.
Our problem is now twofold, and getting ever worse. It used to be, I believe, much more usually a matter of perversion in terms of someone getting into this sin, and then abusing others. Now, that same situation is coupled and very much inflamed with the crisis of human beings so rebelling against God, that in their revolutionary fervor, they have tried even to renounce their own humanity, only to fall into these perversions in order to feed in some way (however twisted or sinful) the natural desires none of us can escape, but which they are trying desperately to deny.
At the bottom of almost every crisis... moral, social, political, artistic, you name it... it is becoming clearer and clearer that there lies a more fundamental revolution, with more far reaching consequences than most people yet realize: a revolution against God, everything Godly, everything God made, in the way God made them and so forth... A complete attempt to throw off the Divine authority and to enthrone man as and in the place of the Creator. That revolution, which began with the first "non servum" (I believe), has been working on and in mankind ever since. Today, the revolution has reached a fever pitch, and is so total and complete, that people rarely even begin to realize how thoroughly the chaos in virtually every department of human life, thought and action, are united under the same diabolical war cry of, "we will not serve!" This issue is a perfect illustration. Deny the nature of man as God created it, and try to change it, and you will fail... but man, in his weakness, and unable to escape that nature, WILL find an outlet, even as he found idols with which to try to replace his need for religion.