The mystery of the finger nails

Do blow up this photograph and take a look at what the lady has in her hand. She's is in the middle of cutting the man's fingernails. Now I find this rather strange. Here they are sitting on a nice bench by the sea - by Le Bastion, in fact, not far from the main market area. Is this the place to cut fingernails? I have tried to think this through. I don't imagine they live together else surely, if he needs someone to cut his finger nails, then they'd do it at home. And why can't he cut his own fingernails?

Anyone got the answer to this?