They also don't worry about what others think.
I didn't learn that until I had to teach a computer class at age 35 to non-technical people. I started by just answering questions, but by session 3, I rewrote the whole class and talked for 90 minutes per session.
Later, I gave speeches at conventions. You never know where things will lead.
Finally, at age 72 I started karaoke. I never did anything like that even in 5th grade.
here is a slightly different viewpoint:
"No one gives a shit: The 20–40–60 Rule"