Ain't It Crazy/The Rub lyrics

Man got the rub on, sister got the rub
They're goin' around doing the rub, the rub
Ain't it crazy, ain't it crazy
Ain't it crazy one day keep on rubbin' that thing.
Two old ladies was lying around in bed
One turned over and this is what she said,
Mama tell the chicken her body was a duck
Put him on the table with his feet sticking up
Two old ladies playing in the sand, each one wishing the other was a man
Well I see that woman goin behind the hill
I'm gonna find that girl, I'm gonna do my will
Well I feel so good, well I feel so fine
All I gotta do is drink that wine
I say the little old rooster called the little old hen
He said he had no lungs, ain't got no wing.

Submitted by Guest

What do you think is the meaning of Ain't It Crazy/The Rub by Grateful Dead?