Swimming peacefully to reach my goal,
Using no arms to reach the col.
Fruit of the effort I am,
Even though men go ham.
Many brothers and sisters,
Yet only one winner.
I have no ex and you may ask me why,
The answer, my friend, is that I'm a little shy.
Don't be fooled, I can still knock,
But I might stay on the rock.
How old am I must likely, and who am I ?