The reason that violent entertainment is harmful is that it is embodied via somatic empathy.

Humans have selectively bred dogs to have facial expressions like ours so that we can better communicate our emotions to each other

When we take pain killing medication such as paracetamol we also reduce our ability to feel empathy with others.

One reason we don't enjoy witnessing, hearing, or even thinking about others being hurt is that it activates pain regions in our own brain.

Why mindful attention helps remould your body

Pain reduces when you hold hands with someone who cares. What is going on?