Answer:
I like to twirl my body but keep my head up high. After I go in everything becomes tight
I make you weak at the worst of all times. I keep you safe, I keep you fine. I make your hands sweat and your heart grow cold. I visit the weak, but seldom the bold. What am I?
I am owned by every man though my length differs. Their wives uses me after getting married.
You write on me and secrets I can keep. In places never seen. I spin like a top. Though stiff as a board I'm often described like a mop.
I need to be taken before you can have me. What am I?
They're actually great swimmers now, but later they will become excellent hoppers.