Good Riddles

Question: I'll bring out your bulls,
and slow your roll.
I may even come out of your skull.

What am I?

Question: What is the easiest way to poke a balloon without popping it?

Question: I am what men love more than life Fear more than death or mortal strife What dead men have and rich require I'm what contented men desire

Question: What do you call 2 Us?

Question: what did the postman say to the mailbox?