The interesting thing is that the title subject's identity has long been a matter of speculation, with Simon stating that the song refers to three men, only one of whom she has named publicly, actor Warren Beatty (In November 2015, Simon, promoting her about-to-be-published memoir, said, "I have confirmed that the second verse is Warren (Beatty)," and added that while "Warren thinks the whole thing is about him," he is the subject only of that verse, with the remainder of the song referring to two other, still-unnamed men).
Perhaps somewhat ironically, while he was quite the playboy back when, Beatty has been only married once and has remained married, for over 24 years to the same woman - Annette Bening, making him more monogamous than Trump.