It is reasonable to assume, when four different encyclopaedia on the web, talk about Cecil Sharps, bowdlerisation of the Keeper that this information is correct.
Then I go to TONY MCARTHY[BAWDY BRITISH FOLK SONGS;he says.
To some of the collectors who went out to find what they imagined to be the dying music of the peasantry, at the end of the last century,this was a matter of some horror..They were impressed by the beauty of the melodies but felt obliged to edit or suppress many words.
THEN I go to my own personal experience, we sang the keeper at school, the version from Sharps songs for schools,   which had no SEXUAL CONNOTATIONS, and certainly was not about rape.
ThenJim Carroll[ A Respected collector himself] says Sharp changed the words of songs to make them acceptable in schools.
If anyone can provide the text to the original version and also the version in the schools version, It would clarify matters.