“The five songs that were cut before rehearsals include a tune called “Lady Liza,” sung by Higgins and his buddy Colonel Hugh Pickering; “Please Don’t Marry Me,” a lament for Higgins; and “Shy,” in which Eliza confesses she has feelings for her professor. The composers decided that wasn’t true to George Bernard Shaw’s original play, so they replaced it with “I Could Have Danced All Night,” where she expresses excitement rather than affection.”