@chicazul – Curiously, "First of May" probably won't bother my 11-year-old, but might bother my 14-year-old but only because I'd be with him. With his friends, he'd think it was great.
Captain Wife's Lament wasn't too bad, either it would go over the 11-year old's head or it wouldn't be a problem.
Thanks for the feedback.
Changing the topic, does he ever do "The Whiffenpoof Song"?