The person you are interacting with is trying to browbeat you because they don't like what you are saying because they have some weird anti-porn beliefs, which frankly, a lot of people do. They themselves are falling trap to the 'porn corrupts' anti-sex narrative, while seemingly being critical of anti-sex narratives. I see this all the time.

And they are mad you are suggesting that all media corrupts, and porn isn't some super special deeply influential thing compared to any other media consumption. You evil porn-normalizer!