I can understand it, Onhell. David Bowie has always had an experimental streak. So while much of his music is straightforward rock, some of the more out-there stuff could be called 'strange', perhaps.
And Sinatra? Don't get me started. All those nice little 2-and-a-half-minute ditties were the result of creative editing from the 48-minute booze-fueled experimental jam sessions, when the entire orchestra ate those funny-smelling mushrooms and engaged in orgiastic solos so outlandish they'd make Charlie Parker blush and repair Dizzy Gillespie's giant cheeks. Meanwhile Sinatra, between beating up waiters for screwing up his drink orders, would improvise surreal poetry over the whole mess. And when the producer came back into the studio from his trysts with 5-dollar whores, the whole band would sit up straight and go back into the chorus like it was a real song. Satisfied, the producer would head out to look for some high-quality horse and the session would evolve/devolve back into more free jazz and tribal rhythms while Frank loosened his tie and launched into drunken anti-Communist rants.