He's his own grandpa

Now many many years ago
When I was twenty-three
I was married to a widow
Who was pretty as could be

This widow had a grown-up daughter
Who had hair of red
My father fell in love with her
And soon the two were wed

This made my dad my son-in-law
And changed my very life
My daughter was my mother
'Cause she was my father's wife

To complicate the matter
Even though it brought me joy
I soon became the father
Of a bouncing baby boy

My little baby then became
A brother-in-law to dad
And so became my uncle
Though it made me very sad

For if he was my uncle
That also made him brother
To the widow's grown-up daughter
Who, of course, was my step-mother

I'm my own grandpa
(He's his own grandpa)
It sounds funny, I know
But it really is so
I'm my own grandpa

My father's wife then had a son
Who kept him on the run
And he became my grandchild
For he was my daughter's son

My wife is now my mother's mother
And it makes me blue
Because, although she is my wife
She's my grandmother too

I'm my own grandpa
(He's his own grandpa)
It sounds funny, I know
But it really is so
I'm my own grandpa

Now if my wife is my grandmother
Then I am her grandchild
And every time I think of it
It clearly drives me wild

For now I have become
The strangest case you ever saw
As husband of my grandmother
I am my own grandpa

I'm my own grandpa
(He's his own grandpa)
It sounds funny, I know
But it really is so
I'm my own grandpa

Oh, that years