Individually their outfits are good-looking; together they are sexy squared, and reduce Crush to an Anastasia Steele-esque quiver. Stella McCartney and her husband Alasdhair Willis have sartorial symbiosis down to a fine art: he in white tie and tails, she in a cream and black silk dress over trousers. It’s the fashion equivalent of tantric sex and we’re longing for lessons. Also giving a masterclass in matchy-matchy at the Met were Sean Penn and Charlize Theron, whose look is very ‘We are independent spirits but we work as a team (especially when I’m in Dior!)’. Tom Daley and Dustin Lance Black, bless them, should take a leaf out of their book as nobody likes a copycat.