This is the version I've been singing for the last 30 years.
It is the bowdlerised Army version of a Navy song, or so I've been told.

BELL-BOTTOMED TROUSERS
CHORUS
...Singing of bell - bottomed trousers, coats of navy blue
Let him climb the rigging like his Daddy used to do...


...Once I was a serving maid way down in Drury Lane.
My mother she was kind to me and my sister was the same.
Then I met a sailor boy at home on liberty
And Oh! To my woe he took liberties with me...

...'Twas at the ball I met him and he asked me for a dance
I knew him for a sailor by the way he wore his pants
His shoes were brightly polished and his hair was neatly combed
And after the ball was over he asked to take me home...

...Well he called for a handkerchief to tie around his head
And likewise for a candle for to light his way to bed
And like a foolish maiden I could see no harm
In lying beside the sailor boy, just to keep him warm...

...Well I knew he was no Samson but that night he went to town,
He laid me in my bed until my blue eyes turned to brown,
And early the next morning just before he went away,
A £5 note he gave to me and these words to me did say...

...He said take this my darling for the damage I have done,
For you may have a daughter or you may have a son.
If you have a daughter then bounce her on your knee,
But if you have a son, send the bastard off to sea...

...So come all you young maidens and listen to my plea.
Never let a sailor lad an inch above your knee.
For once I had a sailor but now he's gone to sea
And left me with a pair of twins to bounce upon my knee