How about that "You are my sunshine"?
I briefly taught English in a tiny private school for the children of Iranian grad students at U. of Toronto. This was a very conservative crowd, with girls of 8 or 9 wearing head coverings and pictures of Ayatollah Khomeini on the walls. Anyway, I taught the kids to sing "You are my sunshine" and later got a call from one of the parents who said (quite nicely) that this kind of song was not appropriate for children.
I was quite embarrassed by this - I'm just glad I taught only the chorus and not the verse with "As I lay sleeping I dreamt I held you in my arms..."