Answer: None it's a hole.
Pun 9: I did a theatrical performance about puns, really it was just a play on words.
Pun 10: A guy just assaulted me with milk, creme and butter. How dairy!
Joke 14: What do you get from a pampered cow? Spoiled milk!
Joke 15: What did the duck say to the comedian? You quack me up!
Riddle 6: The person who made it, has no need for it. The people who buys it, does not use it. The person who uses it, doesn't know it. What is it?
I will update in a bit...