When Kim Kardashian wore Marilyn Monroe’s dress to the Met Gala recently – the shimmering, crystal-studded, second-skin gown in which MM sang her infamous rendition of ‘Happy Birthday, Mr President’ to JFK in 1962 – many people had a collective fit of the vapours. You’d have thought someone had wiped their nose – or worse – on the Stars and Stripes in front of the White House, that some act of sacrilege had been committed.