I'm so glad you mentioned the concept of "corrupting" the kids, Mairead.m. One of the songs I sang to the kids when they were little was Haul Away Joe (which has a soothing, swaying lilt to it when sung gently). My then-wife used to complain about the immorality of singing them a song which contained the lines:

Me muvver often told me
Away haul away, we'll haul away Joe
That if I didn't kiss the girls
Me lips would grow all mouldy
Away haul away, we'll haul away Joe

...which is one of the many reasons she's no longer my wife, but that's another story.