There are no genes that directly make your blood circulate; rather, the genes that build you, do so with a circulatory system. One could say that circulation is less genetic than homosexuality, for instance, where there actually is a candidate gene or gene cluster that directly impacts hyoperfertility in female carriers and homosexuality in male carriers.

Yes, you cannot choose whether to be gay or not, only whether to behave as if you were in or out of the closet. But that's all I've been saying - that nurture gives us the choice to override our natures.

It should have the chance make that choice intelligent and educated, not dogmatic nor out of fear of authority.

Especially if such authority will not manifest till after your death, one would think.