IS she or wasn't he? - that is the question. Much mirth among the chattering classes that two of the shapely models at the Gucci fashion show held the other night - hmmmm . . . how shall we put it - did not come into this world as girls. Come to think of it, one of our tai-tai friends did look, rather enviously we thought, at one of the models strutting the catwalk and remark: 'She's got everything a man could want.' Little did we realise then that what she very obviously meant was broad shoulders . . . muscular arms . . . designer stubble . . .