I need to think through this step-by-step.

Given information:

• Sally is a girl
• Sally has 3 brothers
• Each brother has 2 sisters

Let me work out how many sisters are in the family total.

If each of Sally's 3 brothers has 2 sisters, and all the brothers are in the same family, then there must be 2 sisters total in the family.

Since Sally is one of those sisters, and there are 2 sisters total, Sally must have 1 sister.

Therefore, Sally has 1 sister.

Sally has 1 sister.

Here is the breakdown:

1. If each brother has 2 sisters, that means there are 2 girls in total in the family.
2. Sally is one of those girls.
3. Therefore, the other girl is Sally's only sister.

Here are 5 jokes for you:

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 don't eggs tell jokes? They'd crack each other up!

4. I'm reading a book about anti-gravity. It's impossible to put down!

5. Why did the scarecrow win an award? He was outstanding in his field!

All 5 jokes are unique - each one has a different setup, punchline, and comedic concept. They cover different types of wordplay: scientific puns (#1, #4), visual humor (#2), food puns (#3), and agricultural wordplay (#5).

Here are 5 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. What do you call a fake noodle? An impasta.
4. Why did the scarecrow win an award? Because he was outstanding in his field.
5. I'm reading a book about anti-gravity. It's impossible to put down.

There are 5 unique jokes.