....Joan, who had bawdy tastes, taught us 'O Sir Jasper'[26],
'My God how the Money Rolls in', 'Roll Me Over in the Colver',
'Little Mary up the Glen', 'The Virgin Sturgeon', and a ditty I
have not come across since: I wish I was a fascinating
bitch....Joan's repertoire came to her chiefly through her
boyfriend, a student at University College, London; she used
to go with him to sporting events, college dances and Rag Days,
from which she often brought back some new song or additional verses....

The girl who haughtily begins 'O Sir Jasper, do not touch me!'
is soon cooing 'O Sir Jasper, do!' and ends with an orgasmic
'O! O! O!' Moreover, she is an ideally available figure:

She wears her silken nightly in the summer when it's hot,
She wears her wool pyjamas in the winter when it's not;
But sometimes if you lucky you can catch her in the fall,
When she slip between the lily-white sheets with nothing on at all.

[26]The tune is 'John Brown's Body'. The verse is quoted below.
The chorus is a triple repetition of 'O sir Jasper, do not
touch me', followed by 'As she slips between the lily-white
sheets with nothing on at all'. The chorus is then repeated
several times, removig one word at each repetition ('O Sir Jasper,
do not touch' etc.), till only three very expressive 'O!'s
are left.

"Songs of a Female Student Group, 1949-52" by Jacqueline Simpson. Folk Music Journal, Vol. 4, No. 5 (1984), pp. 504-527

JSTOR link: http://www.jstor.org/stable/4522159