I know it's in a lot of religious texts but I was wondering where and how this came about as a thing. Is there something about the meat? Nowadays I think people do it because it's in their religion or they are vegetarians. But I was wondering why did they even establish that as a thing to do, why did the earlier humans all believe that they shouldn't eat pork.

I believe I remember reading a while back that pigs have organs similar to humans so that got me thinking maybe there is something behind the whole don't eat pork belief.