What’s the answer to the riddle/joke?
I ain’t got no aunts
I don’t get it. I’ve tried saying it out loud, but I got nothin’.
It was more of a mean practical joke in which the boy made the girl feel bad by responding to the question “How does your aunt dance?” with “I don’t think that’s funny. My aunt doesn’t have any legs.”
I guess practical jokes, don’t fit here. I was going to post a couple of my favorites including one by Stephen Leacock sometime but I guess I won’t do that now.
Why did the chicken cross the playground? To get to the other slide.
Why didn’t the skeleton cross the road? Didn’t have the guts.
Childhood classics.
From c. 1982 (when I was in grade school or high school):
Roses are red,
Violets are blue
Sugar is sweet,
And so are you.
But the roses are wilted,
The violets are dead
And the sugar bowl is empty,
Just like your head.
Only there was an alternative ending:
And the sugar is lumpy,
Just like your head.
I never got that one though. Why would a person’s head be lumpy? A local radio DJ told it that way though, FWIW.
To prove to the armadillo it can be done. 
From being beaten upon?
Years ago I had a coworker ask another, who obviously had something on her mind and kept messing up, “What the f*** is wrong with you today? Your dog die or something?” The coworker said “yes” and ran out of the building bawling.
The other coworker started crying also and had to leave work for the rest of the day. They apologized and all was well a few days later when they both were back at work.
I originally wrote ‘armadillo’, but I thought they were too regional while opossums (and raccoons) are dead on the road everywhere.
The ‘possums just want you to think they’re dead
One time I thought my dogs had killed a possum in my backyard. I went out to get it away from them. When I picked it up by the tail it curled up and I thought it was gonna bite my hand! I threw it into the neighbor’s yard that didn’t own dogs. 
They really do play dead!
Our night dog brought one inside. It appeared quite dead. I pushed it out the door and my daughter sat watching it for about 30 minutes, convinced it wasn’t dead. She was right. It got up and walked away.
I’m fat, but I identify as skinny.
I’m trans-slender!
Roses are red, violets are purple
Sugar is sweet, and so is maple surple.
Roger Miller said that.
Roses are red
Violets are blue
But either in candy
Tastes like shampoo
Did you hear the one about the masochist and the sadist?
The masochist says, ‘Hurt me! Hurt me!’
The sadist says, evilly, ‘No.’