Good info!
Maybe it is just because the suave, cool Cary Grant's name was originally Archie Leach is just inherently funny.
Grant must have gone through some tough ball busting as a kid with that name.
Kind of like Jonny Cash's song 'A boy named Sue' or Neitzsche's maxim 'That which does not kill us makes us stronger', I am sure this helped Grsnt to become the suave, debonair actor that he was.