One more thing to add to LB’s comments. There is a concept that Hashem “looked into the Torah and created the world”. If there is a particular issur against a relationship in the Torah, then the world/nature does not contradict that since the Torah came first. To question how can the Torah or Rabbis say something is forbidden when it goes against human nature and tendencies, and Hashem could not possible have meant that, is looking at things from the wrong perspective. Hashem made a mitzva/assur, and created the world accordingly, which means that human nature can and is supposed to try to achieve that ideal, even if it is challenging for a particular individual.
I can appreciate LB, from reading your posts here and on other threads, that it is far easier for a ba’al teshuva to stop eating non-kosher, keep shabbos, etc. than to change a mindset and feel comfortable with Torah-true hashkafa. Kol Hakavod on your efforts to understand.