Standard (EADGBE)

 Now many, many years ago when I was twenty-three

 I was married to a widder who was pretty as can be

 This widder had a grown up daughter who had hair of red

 My father fell in love with her and soon they too were wed.

 This made my dad my son-in-law and changed my very life

 My daughter was my mother for 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 then that also made him brother

 Of the widder's grown up daughter who of course was my step-mother.

 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.

 Now if my wife is my grandmother, then I'm her grandchild

 And every time I think of it, it nearly 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 grand-pa. I'm my own grand-pa.

 It sounds funny I know, but it really is so

 Oh, I'm my own grand-pa.

Enjoy!