Sibling Stories

From Matt Groening's Big Book Of Hell, here are "Lies My Older Brother And Sister Told Me."
 
The Sleeping Alligator Story

Older Bro/Sis: See this? He isn't stuffed, ya know. He's sleeping.
You: Really?
Bro/Sis: If you don't believe me, why don't you put your finger in his mouth?
 
The Boy-Trap Warning

Bro/Sis: Inside my closet, there's a little door, and behind that little door, there's a boogey-man, and he's set traps in there, little boy traps.
You: Really?
Bro/Sis: And they're baited with CUSTARD.
You: Uh-oh.
 
The Alphabet Trick

Bro/Sis: You can come up in the tree fort if you can recite the whole alphabet. You: A B C D E F G H I J K L M N O P Q R S T U V W X Y and Z.
Bro/Sis: Wrong. Scram.
 
The Yes-And-No Mind Puzzler

Bro/Sis: Yes means no and no means yes. Do you want me to hit you?
You: Yes! No! Yes! No! Help!
 
The Lure Of New Toys

Bro/Sis: There's some new toys for you down in the basement. You should go down there.
You: But last time you shut the door and turned off the lights.
Bro/Sis: This time we won't.
 
The Snowflake Story

Bro/Sis: Well I'll be!! Identical snowflakes!!
You: Lemme see!! Lemme see!!
Bro/Sis: Too late. They melted.
 
The Movie Switcheroo

You: Hey!! This isn't Bambi!!
Bro/Sis: This's better'n Bambi.
 
The Elf

Bro/Sis: I'd like you to meet
Tom. You: I don't see anybody.
Bro/Sis: Tom's invisible.
You: Oh sure.
Bro/Sis: He's an elf. If you're nice to him, he'll give you three wishes.
You: Hi, Tom.
 
The family reunion, twenty years later...

Bro/Sis: I don't remember doing any of that stuff to you.
Other Bro/Sis: Me neither.

Brotherly Love

When I was a child I had a condition where I had to eat mud three times a day in order to survive.
I'm so lucky my older brother told me about it!

Sandwiches

A boy says to a girl, "So, sex at my place?"
"Yeah!"
"Okay, but I sleep in a bunk bed with my younger brother, and he thinks we're making sandwiches, so we have to have a code. Cheese means faster and tomato means harder, okay?"
Later on the girl is yelling, "Cheese cheese, tomato tomato!"
The younger brother says, "Stop making sandwiches! You're getting mayo all over my bed!"