I don't believe homosexuality even exists. It's a made-up term used to persecute those who display a simple natural variation of sexuality. I don't believe in hetereosexuality either. There's just 'sexuality.' Males and females who prefer romantic and sexual relationships with their own sex have occured throughout human history. The terms though are relatively new. One of the less noble accomplishments of human beings is the inclination to categorize everything. For whatever reason, rather than viewing ourselves as one species, we seem to need to break ourselves up into categories. Free/Oppressed, rich/poor, democrat/republican, straight/gay are just a few examples. But these are all just ideas as concrete as fairy dust but not as pretty.
Good point.
We see in prisons that straight men become homosexual very quickly.
Biologically, we are heterosexual. We have a drive to procreate and ensure the continuation of our genetic code. IF such a drive is absent, then it is probably a result of millions of years of evolotion that triggers genetic code to end the individual genetic line. Homosexuality is an evolutionary process to remove faulty code from the gene pool.
Men in prison do not become homosexual. They may engage in homosexual behavior but they do not become homosexual. When they are out of prison they do not seek out other men to have sex with, nor do they form emotional attachments and fall in "love" with the men they have sex with.