The very idea of singing "Barnacle Bill" ,without the advice as to the appropriate course of action to be taken should a pregnancy result from Bill and the lady's amourous liaisons, is unthinkable !!
The 'three jolly fishermen' metamorphosed into the Three Jews from Jerusalem,being an account of the mis-adventures of three itinerant Semites,Isaac,Joseph & Abraham, whose disastrous decision to embark upon a coach-trip resulted in their hospitalisation.
When I was at school, the Beach Boys,Paul McCartney,David Bowie,& the Bay City Rollers hadn"t been invented, so we had to make do with such gems as 'Green grow the Rushes-O " , " Some Folks like to Do", and a rather satisfying and VERY politically -incorrect sea-song, "Jonny Come Down to Hilo ", which certainly could NOT be sung by children today without some careful editing !