[Urbane Guerrilla]

Not sure at all about genetic factors; it may be entirely developmental, during gestation. What we don't have is analyzable data on gay parents siring similarly gay children. I don't think we can expect to find a correlation -- after all, year to year, century to century, homosexuality remains a constant percentage, roughly five percent of men and three of women.

A homosexual friend of mine, a man of some quiet sexual attractiveness of his own (attraction is attraction and seems not to correlate with the orientations of the attractor or attractee), once told me, "Nobody sits down and picks homosexuality to take advantage of its opportunities."

Sexual orientation manifests itself long before any sexual experience is gained, and seems to be a component of the self's structure right in there with self-awareness.

What earliest sexual experiences seem to do is not to establish orientation as to influence individual taste in sexual partners -- regular-philias or paraphilias.