For the record, no, I could never date one of my siblings.
I only have to wonder why it's been labeled taboo since the dawn of time, because I've heard several reasons, most not too clear on their origin. Don't tell me it's wrong just because it's 'immoral' -- The question here is -why- is it immoral? How did the societal norms get to be this way? Is it truly just linked to birth defects? Social stigma? Something altogether? And why, if it is so unlawful, does it show up in fiction so often?
Can somebody clarify where all of this comes from?
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