The idea that hearing ANY songs or music is going to affect the development of an ordinary child is codswallop! When I was a kid we sang along with my Dad when we were out driving - ALL sorts of songs , though none with any 'Bad' language . At the age of ten I did a duet with a school friend of 'Cigareets and Whusky ' at a Class Christmas end of term event . My current friends may NOT agree , but I dont think it ever did ME any harm !