the end goes:

d-a-rk dark, dark, darker than the ocean
darker than the sea, darker than the underwear
my mommy puts on me
(and then there are 2 differents ways to finish it which have variations of there own)

A.)
I know I know my ma, I know I know my pa
I know I know my sister with the 80 meter bra
B.)
My mother is Godzilla, My father is King Kong
my sister is the idiot who taught me this dumb song


I think thats all :o)