There are several potential explanations for that behaviour, you should maybe speak to a qualified professional

Me when reviewing my notes:

Why is this so relatable 🥹

Little reminder: autism is a spectrum, and not every person who is autistic necessarily has special interests. :)

Source: https://psychologie-to-go.podigee.io/202-autismus (German)

I have a close friend with schizophrenia, and jokes about “hearing voices” and similar are pretty common among young people in Germany.

I believe that such jokes only harm the understanding of what is actually being joked about, have no value, and may hurt those who are affected by these things.