[A. Pole]

You're making a common mistake in assuming that if something is genetic it must be passed on through the generations. While most often that IS the case, not always. A few examples: after fertilization, a gene in the embryo mutates.

I did not know that mutations can be so frequent and so regular (as to keep on recreating 2% minority with very well defined characteristics). Amazing!

How would you explain the higher frequency of this mutation in prisons or in upper classes of ancient Rome and Greece?

[Pharmboy]

I was not implying at all that homosexuality is due to repeated mutations. If you read on in my post I explain that it is likely a particular combination of genes. Sorry if I was not more clear about that, but please re-read.