Can you please write me three funny limericks about mushrooms?
Sure, here are three limericks about mushrooms that might make you chuckle:

There was a young fellow named Phil
Who ate some strange mushrooms with dill
He laughed and he cried
And his friends all replied
Don't worry, it's just a strange thrill!

There once was a mushroom so bright
That it shone in the dark of the night
But when someone bit
They all threw a fit
Cause the light was the only thing right!

There was a young girl from the city
Whose love for mushrooms was pretty
She cooked them with care
And took them to share
But her friends were all sick - what a pity!
They were brilliant, thank you! Which one do you think is best?
I would imagine the best one would include the most humor while retaining structure. I believe the first has the most simple structure that conveys an idea with a simple twist at the end. Every best is subjective, and must be examined from that unique perspective. My think and/or best is only a computation, after all.