For years, musical theater has been dogged by an aggressively moralistic stance on the part of audiences, who are unwilling to accept immoral behavior by characters in musicals unless it's roundly punished at the end of the story -- a stance the same audiences rarely take when it comes to straight plays and movies. What motivates this difference in approach, and what have been the effects on the art form?

SONGS FEATURED:

"Finale" from My Fair Lady

"Entr'acte" from Carousel

"Overture" from My Fair Lady

"Dream Ballet" from Oklahoma!

"Overture" from Oklahoma!

"Words Fail" from Dear Evan Hansen

"Finale" from Dear Evan Hansen

"Everybody's Got the Right" from Assassins

"November 22, 1963" from A ...