According to The Simpsons, the following contribute to homosexuality:

- MTV
- soda pop
- slim cigarettes
- working at a steel mill
- hunting
- a mother being too effeminate around her son
- naming your son Bruce, Lance, or Julian
- owning a Hawaiian shirt
- eating pink candy
- going "zap" when playing with a toy gun

I think maybe how you were raised could possibly affect it, like if you grew up with an older sister that made you play barbies with her.

And Nathan Drake >_>............. cummon, the guy has an inhuman level of upper body strength and a great sense of humour lol

1. Anything that could make someone associate pleasure exclusively with a certain gender. That would be different from everyone, so I can't say.

2. As for sexual inclination and favorite color, music genre, etc. I wasn't trying to say they are both lifelong. I was just using color and music as examples of things which are developed by post-birth factors, even though we cannot say for sure specifically what factors there are. 

It doesn't look like we're going to reach any conclusion though. At least we can agree that pre-birth and post-birth factors are both involved to some extent. Where we differ is which one we believe is more significant. Until there is some conclusive evidence in support of one theory, you and I (and the rest of the scientific community) are probably going to stick to what we thinks makes the most sense. There will probably never be a theory that really overtakes another. In fact, even today, years decades after the beginning of psychology/sociology, there remains several vastly different perspectives (Psychodynamic vs Behavioralism; Functionalism vs Symbolic Interactionism) that divides scientists in their explanation of behavior/mental processes. Yet at the same time, none of the perspectives are more valid than another. Perhaps the Nature vs Nurture debate about sexual preference will also remain valid perspectives.

So many men, so little time...

Good points.

I actually didn't rule out the possibility of genes being involved because I know there is more to them. The genes topic is very big and there are many things in the argument that need to be cleared, for example, if the fetal development was the determent factor, wouldn't the effects of that period still be measurable in our bodies today?, so examining our bodies would give us all the info that we need if something went "wrong" during the fetal development.

In general, I think we all agree that what makes who we are is more about what we choose to learn from the experiences of life, either through our conscious or unconscious mind; which I think is the key factor here.

Everyone is bisexual. The distinction between gay and straight is an invention of society and culture.

so much truth to this. Once we stop trying to think of it as an "either or" and just as an "is" we will finally start to understand.

Have you ever had a guy friend that you just adored being around?That your relationship was to the point that you loved him but strictly plutonic? Or do you emulate any male figure as the epitome of how you would like to be (personality and looks wise)?

I have always felt this had underlining sexual motivation.....but not entirely. Just depends on what side of the vast sexual spectrum you are on. Many guys and gals are expecially confused by the fact they go through their entire lives not being attracted to a single person of the same sex but then one day, someone of a special caliber shows up and just strikes their fancy in another way.

I am just saying sex is not black and white....but many shades of gray.