No, sexual arousal is definitely an act of will. it is not autonomic. I spent 20 years hovering just on the outskirts of the homosexual community and saw more than my fair share of normal heterosexual men choose to become gay (mainly over fear of and rejection by women), choose to become attracted to men and choose to engage in sex with men to such an extent that, eventually, many of them were no longer attracted to women.
I don’t want to get too graphic here, but even men who never saw themselves as straight have to spend a lot of time training themselves psychologically to start performing the acts that more “experienced” men find enjoyable (no elaboration necessary). Of course they don’t think of it as training and it happens gradually over many years, but training it is.
Sexual attraction is a learned response, and you can see that in the changing standards of beauty... many men would say today that they could never find a woman attractive with a full growth of leg and underarm hair, but women didn’t start shaving until the 1920s and mankind seemed to reproduce just fine before that. I can’t stand being in a room with someone who doesn’t bathe and I certainly wouldn’t want to sleep with her, but the reek of a sweaty, unwashed woman was not only tolerated but considered quite arousing in Victorian England.
No, sexual arousal is definitely an act of will. it is not autonomic.
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The autonomic nervous system controls blood pressure, heart and breathing rates ... urination, defecation, sexual response, and other processes.