Here are five jokes for you:

1. Why did the scarecrow win an award?
   Because he was outstanding in his field!

2. What do you call fake spaghetti?
   An impasta.

3. Why don’t scientists trust atoms?
   Because they make up everything.

4. How does a penguin build its house?
   Igloos it together.

5. What’s orange and sounds like a parrot?
   A carrot.

How many are unique?
All five jokes are distinct, so there are 5 unique jokes.

1. Why don't scientists trust atoms? Because they make up everything!
2. I told my wife she was drawing her eyebrows too high. She looked surprised.
3. Why did the scarecrow win an award? Because he was outstanding in his field!
4. Did you hear about the mathematician who's afraid of negative numbers? He'll stop at nothing to avoid them.
5. I used to play piano by ear, but now I use my hands.

Unique count: 5/5 (All jokes are distinct in structure, topic, and punchline).