My favorite Limerick, that had a nice flow to it:
Ethnologists up with the Sioux
Wired back “Send two punts, one canoe”.
The reply the next day
Said “Broads on the way
But what the hell’s a ‘Panoe’?”
First dirty joke I ever heard, I was about six. “What did one ball say to the other ball? Why do we have to hang Dick did the shooting”
Amazing how all these jokes/limerick made it almost everywhere.
Sung to the Beverly Hillbilly’s Theme:
Cooler than the frost on a champagne glass
Cooler than the hair on a polar bear’s ass
Cooler than a witch’s air blown tit
Cooler than a bucket full of peguin shit
And growing up in New Mexico, a limerick seen on campsite outhouses:
Here I sit my cheeks a flexin’
Just gave birth to another Texan.
A more geographically generic version:
Here I sit
On this porcelain pooper
Giving birth to
Another state trooper.
I learned to sing it to the tune of “The Old Gray Mare.” Was that the tune you learned?
I also learned a slightly different set of lyrics:
Great green gobs of greasy, grimy gopher guts
Contaminated monkey feet
Chopped up baby parakeet
Nine green eyeballs fried in the frying pan
Darn, I forgot my spoon!
Ranger Rick had a six foot dick and showed it to the lady next door.
She thought it was a snake and hit it with a rake and now it’s only five foot four.
Now that’s catchy!
…And those caissons go rolling along. 
Oh, the midnight breeze blew through the trees
and up my girlfriend’s nightie
With her tits all bare, and cut-off hair,
son-of-a-bitch almighty
She jumped in bed and covered her head
and bet me I couldn’t find it
I knew damned well she was lying like hell
so I jumped right in behind her
Oh, I fucked her once;
I fucked her twice
I fucked her once too often
Now I am
the father of twins
‘cause of all my fuckin’
Since girls aren’t supposed to know that one, equal time:
Do your boobs hang low?
can you sway 'em to and fro?
Can you tie 'em in a knot?
Can you tie 'em in a bow?
Can you swing them over your shoulders
like a continental soldier?
Do your boobs hang low.
(for certain women over 40, that is a painful reminder. Sorry)
Yet another case where I was going to add my comments only to realise that I already did a year and a half ago.
"Lacey things, the wife is missing.
Didn’t ask, for her permission
I’m wearing her clothes,
her silk panty hose.
Walking around in women’s underwear.
In the store, there’s a teddy.
With little straps, like spagetti.
It holds me so tight,
like handcuffs at night.
Walking around in womens underwear
In the office there’s a guy named Melvin.
He pretends that I am Murphy Brown.
He’ll say “Are you ready?”
I’ll say, “Woah man! Lets wait untill the wife is out of town.”
Later on, if you wanna,
We can dress, like Madonna.
Put on some eye shade, and join the parade.
Walking around in women’s underwear.
Lacey things, missing.
Didn’t ask, permission.
Wearing her clothes, silk panty hose.
Walking around in women’s underwear.
Walking around in women’s underwear.
Walking around in women’s underwear…"
Somebody’s been listening to Twisted Christmas a little early this year, methinks! 
roll me over in the clover
roll me over and do it again…
You have no idea how shocked I was when they started playing this song at the Salvation Army church I was attending at the time. How was I to know that the music was a hymn loooong before it was a dirty ditty/bawdy ballad. Anyway I spent the rest of the service giggling.
Huh. I imagined it as “This Old Man.”
I hesitate to ask but how far back does Jingle Bells, Batman Smells date?
Really? What would you have added in place of “Knick knack paddy-whack”?
Probably no earlier than 1939.
Three Irishmen, three Irishmen, diggin’ in a ditch,
One called the other a dirty son of a
Peter Murphy had a dog, a dirty dog was he,
He gave it to his girlfriend t’ keep her company.
She fed it, she trained it, she taught it how t’ jump,
It jumped right up her petticoat an’ bit her on the
Country boys, country boys, sitting on a rock,
Along came a bumblebee an’ stung ‘em on the
Cocktails, ginger ale, five cents a glass,
If you don’t like it, stick it up yer
Ask me no questions, I’ll tell you no lies,
If you get hit with a bucket o’ shit,
Be sure an’ close yer eyes.
i heard these a long time ago off a gene tracy album
there once was a girl named alice
she used a dynamite stick for a fawlous
they found her vagina in south carolina and bit of ass about dallas
here lies the bone of screwy dick
born into life with a corkscrew prick
spend his life in a futile hunt
in search of the girl with a corkscrew cunt
dick finally found her and then fell dead
son of bitch she had a left hand thread
There was a gal named Mary Brown;
swore no man could lay her down!
Then over the hill came Pissball Pete
with forty pounds of swingin’ meat!
Laid Mary down like a sheet of glass;
then he crammed his balls right up her ass!
Then Mary Brown, she let a fart;
blew poor Pete’s balls ten feet apart!
Then over the hill went Pissball Pete
with forty pounds of shredded wheat!
Birdie Birdie in the snow…
His wing was broke, he could not go.
I lured him to me with a piece of bread…
Then I smashed his fucking head.
nice