I have seen on /r/relationships a lot of times calling certain stories fake because they showcase AFBB. Post is deleted on /r/relationships but this was a summary of it.

Story

In the story, there was a woman that had an ex, that dated a guy he was a cocky asshole type, she had multiple threesomes with him and her friends. The guy supposedly had a big dick and she had amazing sex with him, but he cheated on her multiple times and they split ways. Now she is with her new boyfriend, and he is insecure because he heard about her ex and his dong. She is happy with him, sex isn't as good, but overall he is a better boyfriend for her and she wants him to be less insecure.

From the writing style I didn't think it was fake, and when I put in an online Gender guesser it also identified it as female. Nothing in the post said it was fake, however a lot of people saying it was fake.

My Theory

I think a lot of BP people wanted it to be fake because it shatters their world view. They don't like to think that their wife or future girl they married, had better sex with another man. And that there is nothing they can do about it.

The woman didn't do anything wrong, she never cheated on her boyfriend, didn't try to contact the ex. All she did was have consensual sex before ever meeting her boyfriend. She isn't a bad person.

But that's my view on this. Curious as to what everyone else thinks :)