Same sex attraction causes

Few aspects of human biology are as complex—or politically fraught—as sexual orientation. Now, a new study claims to dispel the notion that a single gene or handful of genes make a person prone to same-sex behavior. The analysis, which examined the genomes of nearly half a million men and women, found that although genetics are certainly involved in who people choose to have sex with, there are no specific genetic predictors. Yet some researchers question whether the analysis, which looked at genes associated with sexual activity rather than attraction, can draw any real conclusions about sexual orientation. The handful of genetic studies conducted in the past few decades have looked at only a few hundred individuals at most—and almost exclusively men. Other studies have linked sexual orientation with environmental factors such as hormone exposure before birth and having older brothers.
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Homosexuality

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Why Are Some People Same-sex Attracted? | Articles | Living Out

Why do I experience same-sex attraction? Others make the point that there is no cause. Some are part of a blame game. According to some people it is a decision that I made.
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Sexual Attraction and Orientation

Human same-sex sexual attraction SSSA has long been considered to be an evolutionary puzzle. The trait is clearly biological: it is widespread and has a strong additive genetic basis, but how SSSA has evolved remains a subject of debate. Of itself, homosexual sexual behavior will not yield offspring, and consequently individuals expressing strong SSSA that are mostly or exclusively homosexual are presumed to have lower fitness and reproductive success. How then did the trait evolve, and how is it maintained in populations?
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As people pass from childhood into their teen years and beyond, their bodies develop and change. So do their emotions and feelings. It's common to wonder and sometimes worry about new sexual feelings.
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