[philman_36]

Because identical twins have the same DNA, the presence of "split" twin pairs indicate that sexual orientation is not down to DNA.

Well that just...ahem...blows away the "homosexuality is genetic" argument.

[WhiskeyX]

“Well that just...ahem...blows away the “homosexuality is genetic” argument.”

No, it does not. Non-genetic factors, especially in the uterus during gestation, also alter the expression of the genes and the hormonal developments.