Funny Riddles

Question: I join you in battle, fist clenched tight.
We pound three times with all our might.
If my rival decides he will sign for peace;
I'll crush him, and the fight will cease.
But if he lays his hand down flat;
I'll suffer defeat, that is that.

What am I?

Question: I build bridges of silver and crowns of gold.Who am I?

Question: Timmy's mother has three children. The first was named April. The next was named May.

What is the final one's name?

Question: No matter how much rain comes down on it it won't get any wetter.

What is it?

Question: A man shaves several times a day, yet he still has a beard.

Who is this man?