Answer:
I am a protector. I sit on a bridge. One person can see right through me, while others wonder what I hide. What am I?
I am owned by every man though my length differs. Their wives uses me after getting married.
I am a certain five-letter word and become shorter when you add two letters to me. What am I?
What has 4 fingers and a thumb but isn't alive?
I have a strong affection for belly buttons.
I will disappear every time you say my name.