Nobody's got it right yet. This is how I learned it:

Oh the farmer and the maiden they were courtin' pretty fair.
Out behind the barn they didn't know that I was there.
The farmer he was bashful and the maiden she was shy
And when he asked her if he could, this was her reply

You can do it if you want to but you've got to do it right
You better not do it like you did the other night
Cause if you do well I'm a tellin' you
I'll never let you do it again

I mean the laundry

I'll never let you do it again

And there was granny
Swingin' on the outhouse door
Without a shirt on
Brother - could you ask for more?
Two dollars please.