Do kids know how to fail?

For a boy, one of the ways he becomes a man, is to try things and fail. From what I have been reading
many boys don't want to try different things, because they are afraid to fail.

I have seen this with many people, adults included. My sister is one of them. She has never, ever, tried a sport
of any kind throughout her life. And I know why, it is because she is afraid she will fail, and someone will
laugh at her.

But to become a man, boys MUST fail at things, if you don't, you will never become a man, because it means
that you never try new things, and you never take risks.

Could you imagine through time, people never trying new things? never taking risks?