446-448. Irish you a Merry Christmas

There once was a man named McGruder,
Who couldn't have been any cruder.
He found a young lass
With a beautiful ass,
And after he wud'er, he scrud'er.

There once was a man named McGregor,
Whose wife was about six months pregger.
With her belly so big,
Old McGregor, that pig,
Came in from the backside to peg 'er.

Here's one 'bout a slut named McGeorge,
With a pussy as hot as a forge.
She took on all men
Who wanted to sin,
And could make even old guys engorge.

Thanks to "Boulderite's" 2nd comment (q.v. below), I googled "Mc vs. Mac."  I had always thought inclusion of the 'a' indicated Scottish origins while omitting it meant Irish.  According to each article I read, either prefix can denote either ethnicity.  Since my title requires it, the protagonists shall remain offspring of The Emerald Isle.