Jews and Muslims have dietary laws. (Buddhists and Hindus may have them also.) I know I have read what God has said about the effects of breaking these laws. I am sure the Jews considered them as important as other laws.
However, Jesus changed the focus. He said it didn’t matter what we ate. It had no spiritual effect. What mattered was what we said or did. What we ate went into our stomachs. What we did or said came out of our hearts. It was not even what goes into our hearts that’s import. It was what came out of our hearts that mattered.
Does that mean we can “stuff” our hearts with sex and violence? It is not going out of our hearts?
I guess the answer to that question is a definite maybe. Technically, I suppose viewing sex and violence is receiving into our hearts. However, Jesus also said that what comes out of our hearts is an overflow of what we put into our hearts. So, what we read, view or listen to enters into our hearts and becomes a part of the structure that forms what we do and say. So, people appear to operate on a “GIGO” principle: “Garbage In, Garbage Out” or “Good In, Good Out.”