paul mccartney's song blackbird is english slang for an african american girl (a 'black bird'). the song is about racism in america.

side note: the beatles had written in their performance contracts in the u.s. that they would not play any shows where audiences were segregated.

the beatles song ticket to ride wasn't about trains. john lennon wrote it about prostitutes in hamburg. the 'tickets' were health cards that they carried to prove that they were free of sexually transmitted diseases.