Interesting question as most heterosexuals never consciously decide to be heterosexual as that is the default (natural) behavior for humans. Our physiology drives it. We are the default until we choose otherwise.
I never consciously decided to not be a murderer either. But not being a murderer is the default for humans. You need to look at the maladapted ones and figure out why they chose to be maladapted
If you turn the question around you will discover truth.
Ask the homosexuals when they first decided to be homosexuals and most of them will say "after I had sex with Mr X". After they are molested they 'discover' that they are 'gay'. It's a common psychological defense mechanism, identify with your attacker. It's commonly taken advantage of in brain washing scenarios. (How did Patty Hearst join the SLA?) If these people were never molested they'd never be 'homosexual'. Homosexuality is a disease caused by trauma and one of the great underlying traumas is molestation. (And as shown earlier in the thread as many as %73 percent of male 'homosexuals' admit to having sex with (molesting) boys)
People are not machines, there is no "default" in us. If there is, then that "default" applies equally, and to some, that "default" is different than to others.
Now, if homosexuality is a choice, then you need to convince me that you can make yourself chose to be attracted to other men (I am assuming you to be a male based on your FR name)...I can't, but apparently, you think that you can.
"Ask the homosexuals when they first decided to be homosexuals and most of them will say "after I had sex with Mr X".
That's an incredibly ignorant statement, you obviously again believe that a heterosexual can make the choice of having sex with a member of the same sex without first being a homosexual.
If that man had sex with "Mr. X", then obviously he was a homosexual.
I have asked that question, and the answer has always been, "I have always known that I was a homosexual".
My Lord, but that's incredibly ignorant!
I can't believe you actually hit the "Post" button on that!
So, in your world, men don't know whether they are homosexuals or not until AFTER they've had sex with a man, and decided whether they liked it or not?
Man...what's wrong with you?