I'm interested in learning more about 'riddle songs' (I'm not sure if that's what they are generally known as?), meaning those songs which contain impossible tasks and bizarre topsy-turvy situations.
So far I've only crossed paths with a couple, but I'd love to know some more, and of course what they're all about and what (if any) the meaning or purpose behind them is!
I know that these will already both be in the database, but here are the only two I currently know in this vein - by way of illustration:

Nottamun Town

In Nottamun Town, not a soul to be seen
Not a soul would look up, not a soul would look down
Not a soul would look up, not a soul would look down
To show me the way to fair Nottamun Town

I bought me a horse 'twas called a grey mare
Grey mane and grey tail and green stripe on her back
Grey mane and grey tail and green stripe on her back
Weren't a hair upon her that was not coal black

She stood so still threw me to the dirt
She tore at my hide, she bruised my shirt
From saddle to stirrup I mounted again
And on my ten toes I rode over the plain

When I got there no one did I see
They all stood around me just looking at me
I called for a cup to drive gladness away
And stifle the dust for it rained the whole day

And the King and the Queen and the company more
Came a riding behind and a walking before
Come a stark naked drummer beating a drum
With his hands in his bosom came marching along

Sat down on a hard hot cold frozen stone
Ten thousand stood round me but I was alone
Took my hat in my hand to keep my head warm
Ten thousand was drowned that never was born

The second that I came upon recently was an Essex *variant* of the immortal Scarborough Fair (found in a Sue Cubbin book) - I don't have the name of this song or its lyrics, but I'd like to know it if anyone can advise me!
In any event here's Scarborough Fairs's riddle me this lyrics that everyone here will of course know, but they are wonderful nonetheless:

SCARBOROUGH FAIR

CHORUS: Are you going to Scarborough Fair?
Remember me to one who lives there,
Remember me to one who lives there,
For once she was a true love of mine.

1. Tell her to make me a cambric shirt,
Without any seam or needlework,
Without any seam or needlework,
And then she'll be a true love of mine.

2. Tell her to wash it in yonder dry well,
Where water ne'er sprung, nor drop of rain fell,
Where water ne'er sprung, nor drop of rain fell,
And then she'll be a true love of mine.

3. Tell her to dry it on yonder thorn,
Which never blew blossom since Adam was born,
Which never blew blossom since Adam was born,
And then she'll be a true love of mine.

4. Tell her to find me an acre of land,
Between the salt water and the sea strand,
Between the salt water and the sea strand,
And then she'll be a true love of mine.

5. Tell her to plough it with a lamb's horn,
And sow it all over with one peppercorn,
And sow it all over with one peppercorn,
And then she'll be a true love of mine.

6. Tell her to reap it with a sickle of leather,
And bind it all up with one peacock's feather,
And bind it all up with one peacock's feather,
And then she'll be a true love of mine.

7. Tell her to tie it all up in a sack,
And carry it home on a butterfly's back,
And carry it home on a butterfly's back,
And then she'll be a true love of mine.