But is that really true?

I understand the biological justification loop hole...
I've seen a lot of these questions lately, and it seems like many of the opinions given are somewhere between "go for it, it's not like you're blood related" to "well it could be complicated, but at least you're not related".
I don't judge people for what they choose to do...
But I just think that people need to understand what they're actually asking, as well as what advice they're getting/giving.
As a person that has full, half, and step siblings... they are ALL FAMILY MEMBERS to me. I'm close to them. I love them. I trust them.
So as an example... when a girl is 18 and her step brother is 32... how does the fact that "they're not blood related" make it "ok" for them to do whatever? But if for instance, they had the same dad, even though they were not raised together because he had two completely different families with two different wives... instead of "OK" now all of a sudden it's off the charts 'wrong, sick, gross, etc.".

You can say she's "not related to be" if that makes you feel better... but in reality... she's YOUR SISTER by living arrangement (see image above), as your parents raised you as siblings. Think about it...
Again, I'm NOT judging...
Personally, I believe that people simply don't think these things through before they ask these questions or offer advice on them.
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