I sang many folk songs at school - usually out of "The National Song Book" - Twankydillo, Just as the Tide was flowing, The Mermaid, Sweep away the morning Dew, etc.

I wonder though, if my spinster teacher had any idea that "Morning Dew" referred to female virginity and that the verse:
My father bought a likely mare on last St Swithin's day,
But when he put her to the fence, she backed and backed away.
didn't actually refer to equine persuits !