If it were, homosexuals would be extinct as they fail to breed and would self extinguish.
Only if the putative phagot gene(s) is/are 100% penetrate (pun and genetic term intended).
Anyone with a 'C' average in public school biology class would have learned that genetics is not so simple and straight forward. Especially as to how it relates to behavior.
Ruling out the putative genetic components for phagotry takes more that the Extinction argument.
