Ok, Here is what Michael Hurley sings. Most verses are the same as the first with only the middle two lines changing.

YOU'RE GONNA LOOK LIKE A MONKEY WHEN YOU GET OLD

You're gonna look like a monkey when you get old
You're gonna look just like a monkey when you get old
I can tell 'bout your hair
You caught coconuts in the air
You're gonna look like a monkey when you get old

I can tell by eyes
You caught coconuts flying high

I can tell 'bout your knees
You been climbing up coconut trees

I can tell by your shape
Your first cousin must be a ape

Nobody stays a monkey but you when you get old
Nobody stays a monkey but you when you get old
I can tell by your shoes
You just love to dance the blues
You gonna look like a monkey when you get old

You're gonna look like a monkey when you get old
You're gonna look just like a monkey when you get old
I can tell by your breath
You been lovin' a monkey to death
That's right Sam