Who's moonin' who?!

I joined a nudist colony,
what a big mistake!
everybody's chillin' in the buff,
sippin' soda by the lake

a big ol' gal named Marsha,
stepped on a banana peel;
our feet got tangled together,
as we tumbled down a hill!

my life flashed before me,
rolls of flesh filled my space;
by the time we hit rock bottom,
a giant moon was in my face!

i fought so hard for freedom,
her butt was crushin' my skull;
i began to lose consciousness,
as my vision was gettin' dull!

mounds of sweat overwhelmed me,
six others came to assist,
beneath that skin i was tastin',
the biggest butt i ever kissed!

with a "heave!" and a "ho!" i was free,
my body was a mangled mess;
i spent a week in the hospital,
an ugly sight, i must confess!

i must've been really stupid,
stupidity you can't take back;
i'll never forget that summer,
i got high on the biggest crack!