[Rytwyng]

Although people can change or abandon that religious affiliation, they cannot rid themselves of the genetic propensity to be spiritual.

Hmmm. How about this:

Although people can change or abandon that religious affiliation sexual orientation, they cannot rid themselves of the genetic propensity to be spiritual sexual.

Oh, wait, that's not PC to admit that the expression of underlying propensities can be (gasp) changed.

[AntiGuv]

Hamer wouldn't say that. He would say:

Although people can change or abandon that sexual behavior, they cannot rid themselves of the genetic propensity toward a sexual orientation.